40272

Appears in sequences

• Base-9 palindromes that start with 6.at n=31A043033
• Expansion of (1-x)^(-1)/(1-2*x+x^2+x^3).at n=26A077856
• Numbers n with omega(n) = omega of 3 nearest larger and 3 nearest smaller neighbors.at n=18A101936
• Rectangular table, read by antidiagonals, such that the g.f. of row n, R_n(y), satisfies: R_n(y) = Sum_{k>=0} y^k * [R_{n*k}(y)]^(n*k) for n>=0, with R_0(y)=1/(1-y).at n=52A124560
• Row 2 of table A124560; also, the self-convolution square equals A124552, which is row 2 of table A124550.at n=7A124562
• Triangle T(n, k) = n*( (n-1)! - (k-1)! ), read by rows.at n=31A137259
• Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 6 local maxima.at n=5A159720
• Number of permutations p of [n] such that in 0p the largest up-jump equals nine xx and no down-jump is larger than 2.at n=2A321116
• Triangle read by rows: T(n,k) is the number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly k local maxima.at n=27A334778
• Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly n local maxima.at n=6A334779
• Number of integer partitions of n whose parts do not have choosable sets of strict integer partitions.at n=41A387137