26044

Appears in sequences

• Number of terms in 6th derivative of a function composed with itself n times.at n=15A022816
• Numbers k such that 90*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A056662
• Numbers n such that 3*10^n - 1 is prime.at n=14A056703
• Number of compositions (ordered partitions) of n into 1's, 3's and 5's.at n=24A060961
• a(n) = floor(7^n/3^n).at n=12A094975
• Expansion of Product_{k>0} (1-k^2*x^k)^(-1/k).at n=14A151954
• Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 3,2 4,0 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155341
• Number of 6-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=16A187511
• Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.at n=10A296329
• Expansion of (1/x) * Series_Reversion( x*(1-x)^2/(1-x-x^4) ).at n=13A366088