48470
domain: N
Appears in sequences
- Numbers k such that k * (1+i)^k + 1 is a Gaussian prime.at n=27A058770
- Numbers k such that k * (1+i)^k - 1 is a Gaussian prime.at n=30A058771
- Even numbers n such that n^2*2^n + 1 is prime.at n=15A058779
- Numbers k such that k^2 * 2^k + 1 is prime.at n=25A058780
- Square spiral sequence: numbers are placed in a square spiral, a(1)=1, a(n) is found as the sum of the row (in the previous direction) a(n-1) is in.at n=28A062410
- Numbers k such that (phi(k-2) + phi(k+2))/2 = phi(k); 2-phi/balanced numbers.at n=31A099633
- Position of 5^n in A051037 (5-smooth numbers).at n=43A188427