# A002716 (b-file synthesized from sequence entry) 0 3 1 5 2 13 3 17 4 241 5 257 6 65281 7 65537 8 4294901761 9 4294967297 10 18446744069414584321 11 18446744073709551617 12 340282366920938463444927863358058659841