26286
domain: N
Appears in sequences
- Numbers n such that the sum of the digits of Sum_{k=1..n} (k!) is divisible by n.at n=18A109657
- Number of (w,x,y,z) with all terms in {1,...,n} and w*x<=y*z+2.at n=15A212055
- Expansion of (1+4*x+x^2)/((1+x)^2*(1-x)^5).at n=23A233329
- Numbers n such that Bernoulli number B_{n} has denominator 3318.at n=17A272383
- Integers which can be written in exactly three ways as sum of two distinct nonzero pentagonal numbers.at n=33A333013
- G.f.: A(x) = 1/C(-x*T(x)^3), where C(x) = 1 + x*C(x)^2 is the g.f. of A000108 and T(x) = 1 + x*T(x)^3 is the g.f. of A001764.at n=8A347953
- Number of edges in a hexagon when n internal hexagons are drawn between the 6n points that divide each side into n+1 equal parts.at n=47A357198