137438953473
domain: N
Appears in sequences
- a(n) = gcd(2^((n*(n+1)/2)) + 1, 2^n + 1).at n=36A066827
- Partial sums of A084509. Positions of ones in the first differences of A084506.at n=20A084508
- a(n) = 2^(2*n+1) + 1.at n=18A087289
- a(n) = 2^p + 1 where p is the n-th prime.at n=11A098640
- Half the number of n X 2 0..2 arrays with no element equal its row sum plus its column sum mod 3.at n=18A183425
- a(n) = 2*8^n + 1.at n=12A199493
- Numbers k such that k^2 + 1 divides 2^k + 8.at n=22A319245