262077

Appears in sequences

• Numbers k such that 4^k + 25 is prime.at n=39A204388
• Start with a single square; at n-th generation add a square at each expandable vertex; a(n) is the sum of all label values at n-th generation. (See comment for construction rules.)at n=15A247618
• a(n) = 2^(n - 1) - prime(n).at n=18A277801