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A184061
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T(n,k) = Number of strings of n+2 numbers x(i) in -k..k with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other.
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9
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1, 1, 3, 1, 9, 11, 1, 11, 31, 21, 1, 19, 65, 107, 61, 1, 25, 109, 243, 501, 179, 1, 31, 143, 541, 1731, 2339, 447, 1, 33, 207, 839, 4769, 11251, 10303, 1243, 1, 41, 245, 1531, 10135, 40483, 67083, 44523, 3359, 1, 43, 337, 2145, 21411, 106047, 327223, 426379
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OFFSET
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1,3
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COMMENTS
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Table starts
....1......1........1........1.......1.......1......1......1.....1....1...1..1
....3......9.......11.......19......25......31.....33.....41....43...53..59.75
...11.....31.......65......109.....143.....207....245....337...427..491.573
...21....107......243......541.....839....1531...2145...3345..4477.6181
...61....501.....1731.....4769...10135...21411..35451..59353.89619
..179...2339....11251....40483..106047..251231.496519.945243
..447..10303....67083...327223.1015445.2880959
.1243..44523...426379..2590527.9974135
.3359.198695..2719451.20896283
.9465.888601.17387313
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LINKS
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EXAMPLE
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Some solutions for n=5, k=4
..3....3....1....1...-1....2....3....0....1....1...-2...-1...-1...-2....1....2
..1...-2....0...-4...-2....1....0...-1...-4....0...-2....0...-2...-2...-2....3
.-4...-4...-4....0...-4...-2...-2....2...-1....2...-3....2....0...-1...-1...-1
..2....2....1...-2....4...-4....1....4....1....0....2....1....0....0....1....4
.-1....1....0....0....1....2...-4...-2...-1....1...-1....0....1....2...-1...-2
.-3....4....1....3....2...-1....0....0....3....0....3...-4....0....0....1...-3
..2...-4....1....2....0....2....2...-3....1...-4....3....2....2....3....1...-3
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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