126500

Appears in sequences

• Numbers n such that n^2 can be split into two nonzero squares (perhaps with leading zeros) in exactly two different ways.at n=14A054737
• Tenth column (m=9) of convolution triangle A059594(n,m).at n=8A059598
• Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges in which the maximum number of contiguous border edges starting from the root in counterclockwise direction is equal to k.at n=45A102593
• Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges in which the number of edges from the root to the first branch point is k.at n=45A102892
• Number of noncrossing trees with n edges and having degree of the root at least 2.at n=9A102893
• Triangle, read by rows, such that the g.f. of column k = G(x)^(2k+1) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764 (ternary trees).at n=47A143603
• Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two or three adjacent elements summing to zero.at n=10A200432
• Expansion of Product_{k>=0} (1 + x^(5^k))^(5^(k+1)).at n=22A321357
• Expansion of Product_{k>=0} (1 + x^(5^k))^(5^(k+1)).at n=23A321357
• The Fuss-Catalan triangle of order 2, read by rows. Related to ternary trees.at n=53A355172