23672

Appears in sequences

• Expansion of e.g.f. exp(-x - (1/2)*x^2).at n=13A001464
• Expansion of 1/((1+x)*(1-x)^6).at n=19A001753
• a(n) = least number not of form [ (a^2/n) ] + [ (b^2)/n ].at n=24A036575
• a(n) = 49*n^2 - 2*n.at n=21A157362
• Permanent of the n-th principal submatrix of A204158.at n=3A204241
• Number T(n,k) of parts of each size k^2 in all partitions of n^2 into squares; triangle T(n,k), 1 <= k <= n, read by rows.at n=45A229468
• Numbers k such that 9*R_k + 10^k - 8 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=9A259120
• Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=3A301437
• Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=3A301439
• T(n,k) = Number of n X k 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=24A301443