# A013310 (b-file synthesized from sequence entry) 1 1 2 2 3 0 4 -12 5 -68 6 -208 7 -56 8 3472 9 26272 10 119072 11 234432 12 -1600896 13 -22177088 14 -159056896 15 -769693952 16 -1571891456 17 16806915328 18 276758503424 19 2610810796032 20 18627861722112 21 94941413343232 22 121510785658880