31640
domain: N
Appears in sequences
- Sum of digits in n-th term of A006711.at n=34A022480
- Number of staircase polygons of area n with 2 (staircase polygon) holes on square lattice (not allowing rotations).at n=7A057415
- Antidiagonal sums of table A083362.at n=39A083364
- G.f. A(x) satisfies A(x) = 1 + x*A(2*x)^7.at n=4A171208
- Number of (w,x,y,z) with all terms in {1,...,n} and w*x>y*z+2.at n=16A212056
- Number of n-digit primes representable as sums of consecutive squares.at n=10A218213
- Triangle T(n,k) represents the coefficients of (x^10*d/dx)^n, where n=1,2,3,...;generalization of Stirling numbers of second kind A008277, Lah-numbers A008297.at n=33A223512
- Numbers m such that the GCD of the x's that satisfy sigma(x) = m is 4.at n=35A241649
- Numbers k such that card({x|sigma(x)=k}) > 1 and (Sum_{sigma(x)=k} x) < k.at n=36A258931
- Numbers k such that sigma(k) = psi(k) + tau(k) + omega(k)^7.at n=2A392385