# A148047 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 10 5 20 6 58 7 129 8 466 9 1144 10 3828 11 10104 12 37281 13 101810 14 369043 15 1061567 16 3973614 17 11649570 18 44090410 19 133431028 20 508513935 21 1566776842 22 6059123603 23 19007334896 24 73793026201 25 235333880634 26 921738292786 27 2975020974513 28 11720384280152 29 38315348976215 30 151639320458975 31 500740054300233