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 A119515 Pattern Matrix of alternating sign 5 X 5 Matrix Markov with low ratio and characteristic polynomial: x^5+5*x^4+20*x^3+20*x^2+5*x+1. 0
 0, -1, 8, -28, 71, -150, 281, -483, 778, -1191, 1750, -2486, 3433, -4628, 6111, -7925, 10116, -12733, 15828, -19456, 23675, -28546, 34133, -40503, 47726, -55875, 65026, -75258, 86653, -99296 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA G.f.:x*(x^3+2*x^2+3*x-1)/(x+1)^5 [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 11 2009] EXAMPLE Diagonals alternate in sign: {{-1, 1, -1, 1, -1}, {0, -1, 1, -1, 1}, {0, 0, -1, 1, -1}, {0, 0, 0, -1,1}, {0, 0, 0, 0, -1}} MATHEMATICA M = Table[If[n > m, 0, -(-1)^(n + m), If[n < m, (-1)^(n + m), 0]], {n, 1, 5}, {m, 1, 5}]; w[1] = {0, 1, 1, 2, 3}; w[n_] := w[n] = M.w[n - 1] a = Table[w[n][[1]], {n, 1, 30}] CROSSREFS Sequence in context: A100182 A321237 A328535 * A304343 A153976 A105636 Adjacent sequences:  A119512 A119513 A119514 * A119516 A119517 A119518 KEYWORD sign,uned AUTHOR Roger L. Bagula), Jul 27 2006 STATUS approved

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Last modified April 22 14:33 EDT 2021. Contains 343177 sequences. (Running on oeis4.)