69687

Appears in sequences

• ((Cumulative sum A000045) + (A000079)) - A092176.at n=17A093304
• Triangular matrix, read by rows, that satisfies: T(n,k) = [T^3](n-1,k) when n>k>=0, with T(n,n) = (n+1).at n=17A102098
• Triangle, read by rows, where the antidiagonals are formed by interleaving the rows of triangle A102098 with the rows of its matrix square (A102920).at n=38A102916
• Number of permutations of length n which avoid the patterns 2341, 3214, 4213; or avoid the patterns 1324, 2341, 3214.at n=10A116760