# A009333 (b-file synthesized from sequence entry) 0 0 1 1 2 -1 3 4 4 -8 5 20 6 -61 7 208 8 -888 9 4304 10 -24001 11 149312 12 -1028048 13 7745088 14 -63374221 15 559452416 16 -5299033488 17 53597321472 18 -576514338721 19 6570832389120 20 -79100066353208 21 1002840464045056 22 -13355627237749501 23 186406420596609024