145188
domain: N
Appears in sequences
- a(n) = n*(n + 1)*(3*n + 1).at n=36A027903
- Denominators of continued fraction convergents to sqrt(21).at n=17A041033
- Expansion of (1+3*x+x^2)/((1+x+x^2)*(1+5*x+x^2)).at n=8A110309
- y-values in the solution to x^2 - 21*y^2 = 1.at n=3A174745
- Number of n-digit 7th powers.at n=39A216657
- Number of different figures obtained by a putting two Young diagrams of partitions lambda and mu, such that |lambda| + |mu| = n on top of each other.at n=38A225751
- Numbers k such that A011772(k) > A344878(k) and A011772(k) is a divisor of A344875(k).at n=39A344595