46230

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 86.at n=4A031764
• Triangular array generated by its row sums: T(n,0)=1 for n >= 1, T(n,1)=r(n-1), T(n,k)=T(n,k-1)+r(n-k) for k=2,3,...,n, n >= 2, r(h)=sum of the numbers in row h of T.at n=42A054115
• T(n,n-2), array T as in A054115.at n=6A054117
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n with k cells in the first column. (A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column).at n=41A100822
• Triangle read by rows, T(n,k) = Sum_{j=k..n} j!, 0 <= k <= n.at n=39A143122
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k blocks of length 2 (0 <= k <= floor(n/2)). A block of a permutation is a maximal sequence of consecutive integers which appear in consecutive positions. For example, the permutation 5412367 has 4 blocks: 5, 4, 123, and 67; one of them is of length 2.at n=27A184183
• Number of 4-element subsets that can be chosen from {1,2,...,4*n} having element sum 8*n+2.at n=30A204468
• Array read by antidiagonals: T(m,n) = Sum( n <= i <= m+n-1 ) i!.at n=33A211370
• Least number m such that A323835(m) = n.at n=59A306304