45124

Appears in sequences

• Expansion of (1/theta_4 - 1)/2.at n=29A014968
• A007318 * A000203.at n=12A131046
• a(n) = 2 + (89040 + (71868 + (29932 + (8449 + (1960 + (322 + (28 + n)*n)*n)*n)*n)*n)*n)*n/40320.at n=11A145130
• Number of nX5 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=12A303322
• Numerator of best rational approximation x/y of sqrt(k), y<=k, with k given by A306972. The corresponding denominators are given in A306974.at n=38A306973
• A(n, k) is the k-th number b > 1 such that b^(prime(n+i)-1) == 1 (mod prime(n+i)^2) for each i = 0..3, with k running over the positive integers; square array, read by antidiagonals, downwards.at n=19A319061
• Expansion of (1/x) * Series_Reversion( x*(1+x-x^4)/(1+x)^2 ).at n=15A366098
• a(n) = 4^n - binomial(n,2)*3^(n-2).at n=8A380249