236880

Appears in sequences

• Denominator in Feinler's formula for unsigned Bernoulli number |B_{2n}|.at n=23A002444
• Denominators of Cauchy numbers of second type (= Bernoulli numbers B_n^{(n)}).at n=46A002790
• Denominators of Cauchy numbers of first type.at n=46A006233
• Related to A000032 (Lucas numbers): (n-1)!*L(n).at n=7A039647
• Jabotinsky-triangle related to A039647.at n=28A039692
• A convolution triangle of numbers obtained from A034789.at n=24A092083
• a(n) = Sum_{composite c <= n} n!/c.at n=5A110374
• Product(1 + a(n)*x^n, n=1..infinity) = sum(F(k+1)*x^k, k=1..infinity) = 1/(1-x-x^2), where F(n) = A000045(n) (Fibonacci numbers).at n=32A147542
• Result of using the Fibonacci numbers as coefficients in an infinite polynomial series in x and then expressing this series as (1+a(1)x)(1+a(2)x^2)(1+a(3)x^3)...at n=32A147558
• 1/Product_{n>=1} (1 - a(n)*x^n) = 1 + Sum_{k>=1} F(k+1)*x^k = 1/(1-x-x^2), where F(n) = A000045(n) (Fibonacci numbers).at n=32A157162
• Number of 4-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=26A187289
• Triangle read by rows: coefficients of polynomials p(x,n) defined by 1/(1-t-t^2)^x = Sum_{n=1..oo} p(x,n)*t^n/n!.at n=37A194938
• Triangle of coefficients of a sequence of binomial type polynomials.at n=31A195204
• Number of n-permutations that have exactly two square roots.at n=10A214854
• Expansion of e.g.f. Product_{k>0} (1+k*x^k)^(-1/k).at n=8A294465
• Number of nX3 0..1 arrays with every element equal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.at n=10A298065