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A050871
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Row sums of even numbered rows of array T in A050870 (periodic binary words).
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2
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0, 2, 4, 10, 16, 34, 76, 130, 256, 568, 1036, 2050, 4336, 8194, 16396, 33814, 65536, 131074, 266176, 524290, 1048816, 2113462, 4194316, 8388610, 16842496, 33555424, 67108876, 134479360, 268435696, 536870914, 1074793396, 2147483650
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) T(n, k) = binomial(n, k) - sumdiv(gcd(n+!n, k), d, moebius(d)*binomial(n/d, k/d)); \\ Michel Marcus, Aug 20 2021
row(n) = vector(n+1, k, k--; T(n, k));
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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