# A026624 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 20 4 46 5 100 6 210 7 432 8 878 9 1772 10 3562 11 7144 12 14310 13 28644 14 57314 15 114656 16 229342 17 458716 18 917466 19 1834968 20 3669974 21 7339988 22 14680018 23 29360080 24 58720206 25 117440460 26 234880970 27 469761992 28 939524038 29 1879048132