40857
domain: N
Appears in sequences
- Numbers k such that k^2 * 2^k - 1 is prime.at n=26A058781
- Expansion of (1 - x - x^2 - sqrt(1 - 2*x - 5*x^2 - 2*x^3 + x^4)) / (2*x + 2*x^2).at n=12A078481
- Floor( phi * (3/2)^n ) where phi = (1+sqrt(5))/2.at n=25A081226
- Numbers k such that the sum of first k Catalan numbers is a prime.at n=12A134775
- Numbers k such that either k^2*2^k-1 or k^2*2^k+1 is prime, but not both.at n=48A237759
- Expansion of g/(1 + x^3*g^3), where g = 1+x*g^3 is the g.f. of A001764.at n=8A387679