A309675 a(n) = 4^n^2 + n!.
2, 5, 258, 262150, 4294967320, 1125899906842744, 4722366482869645214416, 316912650057057350374175806384, 340282366920938463463374607431768251776, 5846006549323611672814739330865132078623730534784, 1606938044258990275541962092341162602522202993782792838930176
Offset: 0
Keywords
Examples
a(1) = 5 since 1^1=1, (4^1) + 1! = 5; a(2) = 4^2^2 = 4^4 = 256, 256 + 2! = 256 + 2*1 = 258.
Links
- Andrew M. Kamal, New Field