20624

Appears in sequences

• Numbers n such that n^1024 + 1 is prime (a generalized Fermat prime).at n=24A057002
• Engel expansion of exp(e).at n=26A096194
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1), U=(1,2), or d=(1,-1) and having abscissa of the first peak equal to k.at n=46A108438
• a(n) = 625*n - 1.at n=32A158374
• Position of 3^n in A051037 (5-smooth numbers).at n=47A188426
• Numbers k such that both k and k+1 are not exponentially squarefree numbers.at n=14A342188
• Triangular array read by rows: T(n,k) = the number of closed meanders with n top arches and k closed meanders in the reduction of the closed meander by the reverse of the exterior arch splitting algorithm.at n=32A363910
• Numbers k such that k and k+1 are both in A376616.at n=8A376793