137216

Appears in sequences

• Number of permutations of length n with exactly three valleys.at n=2A000517
• Triangle read by rows: T(n,k) (n >= 1, 0 <= k <= ceiling(n/2)-1) = number of permutations of [n] with k peaks.at n=23A008303
• EXPCONV of squares A000290 with themselves.at n=8A033463
• Composites which use less than all of their digits in their prime factorization.at n=18A074211
• Expansion of e.g.f. exp(tan(exp(x)-1)).at n=8A080831
• The right-hand half-triangle of A185356 (or A202690).at n=40A202815
• Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of six.at n=18A274863
• a(n) = 2^n * (1+n*(n+1)/2).at n=11A340257