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 A176390 A symmetrical triangle:t(n,m)=1 - (1 + n)^(n + 1)* (1 - 1/(n + 1))^(n + 1) + (n + 1)^(n + 2)*Binomial[n, m]((m + 1)/(n + 1))^(m + 1)*(1 - ( m + 1)/(n + 1))^(n - m + 1) 0
 1, 1, 1, 1, 16, 1, 1, 273, 273, 1, 1, 4856, 6246, 4856, 1, 1, 95065, 134785, 134785, 95065, 1, 1, 2073408, 3094575, 3410240, 3094575, 2073408, 1, 1, 50255905, 77413889, 89782273, 89782273, 77413889, 50255905, 1, 1, 1345053808, 2116602172 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS The sequence is an adjusted probability based symmetrical triangle. Row sums are: {1, 2, 18, 548, 15960, 459702, 13746208, 434904136, 14654790000, 526697204570,...}. LINKS Table of n, a(n) for n=0..38. FORMULA t(n,m)=1 - (1 + n)^(n + 1)* (1 - 1/(n + 1))^(n + 1) + (n + 1)^(n + 2)*Binomial[n, m]((m + 1)/(n + 1))^(m + 1)*(1 - ( m + 1)/(n + 1))^(n - m + 1) EXAMPLE {1}, {1, 1}, {1, 16, 1}, {1, 273, 273, 1}, {1, 4856, 6246, 4856, 1}, {1, 95065, 134785, 134785, 95065, 1}, {1, 2073408, 3094575, 3410240, 3094575, 2073408, 1}, {1, 50255905, 77413889, 89782273, 89782273, 77413889, 50255905, 1}, {1, 1345053808, 2116602172, 2532959344, 2665559350, 2532959344, 2116602172, 1345053808, 1}, {1, 39471376041, 63074539521, 77094686721, 83708000001, 83708000001, 77094686721, 63074539521, 39471376041, 1} MATHEMATICA t[n_, m_] = 1 - (1 + n)^(n + 1)* (1 - 1/(n + 1))^(n + 1) + (n + 1)^(n + 2)*Binomial[n, m]((m + 1)/(n + 1))^(m + 1)*(1 - (m + 1)/(n + 1))^(n - m + 1); Table[Table[t[n, m], {m, 0, n - 1}], {n, 1, 10}]; Flatten[%] CROSSREFS Sequence in context: A173585 A022179 A015141 * A178062 A040263 A082696 Adjacent sequences: A176387 A176388 A176389 * A176391 A176392 A176393 KEYWORD nonn,tabl,uned AUTHOR Roger L. Bagula, Apr 16 2010 STATUS approved

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Last modified February 21 18:07 EST 2024. Contains 370237 sequences. (Running on oeis4.)