27632

Appears in sequences

• Expansion of e.g.f. cos(tan(x))/exp(x).at n=9A009074
• Number of non-unimodal compositions of n into distinct terms.at n=29A072707
• Satisfies a(n)/A079159(n) = p_n, the n-th prime (n>0), a(0)=1.at n=37A079161
• a(n) gives the number of conjugacy classes in the permutation group generated by transposition (1 2) and double n-cycle (1 3 5 7 ... 2n-1)(2 4 6 8 ... 2n). This group is a semidirect product formed by a cyclic group acting on an elementary abelian 2-group of rank n by cyclically permuting the factors.at n=18A178752
• Number of nondecreasing arrangements of n nonzero numbers in -(n-1)..(n-1) with sum zero.at n=8A188325
• T(n,k)=Number of nondecreasing arrangements of n nonzero numbers in -(n+k-2)..(n+k-2) with sum zero.at n=44A188333
• Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit.at n=16A257123
• q-Expansion of wedge character chi^(3)(q).at n=21A288579
• The number of regions inside a 2 by 1 ellipse formed by the straight line segments mutually connecting all points formed by dividing the ellipse into 2n equal angle sectors from its origin.at n=14A341688
• Triangle read by rows: T(n,k) is the number of generalized polyforms on the tetrahedral-octahedral honeycomb with n cells, k of which are octahedra; 0 <= k <= n.at n=49A365970