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A294439
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Triangle read by rows: T(n,k) (n >= 1, 1 <= k <= n) = number of normalized 2n-plets associated to trees with k edges.
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0
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1, 1, 2, 1, 6, 5, 1, 14, 28, 14, 1, 30, 110, 120, 42, 1, 62, 375, 682, 495, 132, 1, 126, 1190, 3248, 3731, 2002, 429, 1, 254, 3628, 14062, 23020, 18928, 8008, 1430, 1, 510, 10805, 57516, 127029, 144024, 91392, 31824, 4862, 1, 1022, 31740, 227030, 654395, 968544, 828495, 426360, 125970, 16796
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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EXAMPLE
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Triangle begins:
1;
1, 2;
1, 6, 5;
1, 14, 28, 14;
1, 30, 110, 120, 42;
1, 62, 375, 682, 495, 132;
1, 126, 1190, 3248, 3731, 2002, 429;
1, 254, 3628, 14062, 23020, 18928, 8008, 1430;
1, 510, 10805, 57516, 127029, 144024, 91392, 31824, 4862;
1, 1022, 31740, 227030, 654395, 968544, 828495, 426360, 125970, 16796;
...
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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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