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 A290535 Determinant of circulant matrix of order 6 with entries in the first row (-1)^(j-1)*Sum_{k>=0} (-1)^k*binomial(n, 6*k + j - 1), j=1..6. 2
 1, 0, 0, 0, 0, 0, -104284, -783050688, -329029322076, -43271152876224, -2175830808446736, 0, 5427970251634650916, 307609249050423946080, 8866068073884849492756, 137518739026000524646272, 896278292839676023110288, 0, -2518571790589921864549097500 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 COMMENTS a(n) = 0 for n == 5 (mod 6). LINKS Table of n, a(n) for n=0..18. Vladimir Shevelev, Combinatorial identities generated by difference analogs of hyperbolic and trigonometric functions of order n, arXiv:1706.01454 [math.CO], 2017. Wikipedia, Circulant matrix MATHEMATICA ro[n_] := Table[(-1)^(j-1) Sum[(-1)^k Binomial[n, 6k+j-1], {k, 0, n/6}], {j, 1, 6}]; M[n_] := Table[RotateRight[ro[n], m], {m, 0, 5}]; a[n_] := Det[M[n]]; Table[a[n], {n, 0, 18}] (* Jean-François Alcover, Aug 10 2018 *) CROSSREFS Cf. A290285, A290286. Sequence in context: A076761 A236007 A129241 * A253709 A235005 A231143 Adjacent sequences: A290532 A290533 A290534 * A290536 A290537 A290538 KEYWORD sign AUTHOR Vladimir Shevelev and Peter J. C. Moses, Aug 05 2017 STATUS approved

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Last modified December 1 23:26 EST 2023. Contains 367503 sequences. (Running on oeis4.)