87021
domain: N
Appears in sequences
- Number of partitions into non-integral powers.at n=30A000339
- a(n) = 100*n^2 + 100*n + 21.at n=29A152161
- Expansion of 1 / ((1-2*x)*(1-4*x+x^2)).at n=8A216263
- a(n) = Sum_{k=0..floor(n/6)} (-1)^k*binomial(n,6*k).at n=20A307040
- Expansion of (1 - x)^4/((1 - x)^6 + x^6).at n=20A307089
- Numbers k such that the determinant of the Vandermonde matrix of their digits is equal to sigma(k), the sum of divisors of k.at n=12A307586