55056
domain: N
Appears in sequences
- Number of unlabeled strength 3 Eulerian graphs with n nodes.at n=5A007128
- 9-gonal (or enneagonal) pyramidal numbers: a(n) = n*(n+1)*(7*n-4)/6.at n=36A007584
- Partial sums of A051865.at n=31A050441
- Numbers k such that k and k^2 use only the digits 0, 1, 3, 5 and 6.at n=27A136843
- Numbers n such that n and n^4 are sums of two twin primes.at n=10A212430
- Numbers k such that k and k^3 are sums of two twin primes.at n=18A213811
- Even 9-gonal (nonagonal) pyramidal numbers.at n=26A218329
- Numbers k >= 1 such that k^2 - r^2 is a repunit (A002275) for some 1 <= r < k.at n=24A389493