63480

Appears in sequences

• Number of walks on square lattice.at n=19A005565
• Nonnegative integers n such that 11*n^2 + 11*n + 1 is a square.at n=4A105838
• a(n) = 441*n^2 - 2*n.at n=11A157737
• a(n) = phi(Lucas(n)).at n=23A197218
• Sum of the parts in the partitions of 4n into 4 parts with smallest part = 1.at n=22A239056
• Number of length 2+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=18A253130
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. -exp(k*x)*LambertW(-x).at n=61A294411
• Number of subsets of {2..n} containing all of their integer quotients > 1.at n=22A326078
• Triangle read by rows: T(n,k) = A(k,n-k), 1 <= k < n, 2 <= n, where A(m,n) is the number of distinct strings consisting of one X, 2*m Y's and 2*n Z's in which the X lies to the right of at least m Y's and at least n Z's.at n=23A351584
• Triangle read by rows: T(n,k) = A(k,n-k), 1 <= k < n, 2 <= n, where A(m,n) is the number of distinct strings consisting of one X, 2*m Y's and 2*n Z's in which the X lies to the right of at least m Y's and at least n Z's.at n=25A351584