42817
domain: N
Appears in sequences
- Numbers k such that 27*2^k-1 is prime.at n=41A050539
- Semiprimes (A001358) whose digit reversal is a square.at n=36A115710
- Discriminants of real quadratic number fields with 3-class rank 2.at n=1A269318
- Discriminants of real quadratic fields with 3-class group of type (3,3).at n=1A269319
- Number of ways to split an integer partition of n into contiguous subsequences with strictly increasing sums.at n=33A336134