# A104747 (b-file synthesized from sequence entry) 1 1 2 4 3 12 4 33 5 87 6 222 7 550 8 1327 9 3129 10 7236 11 16464 12 36957 13 82027 14 180346 15 393354 16 852123 17 1835181 18 3932352 19 8388820 20 17826025 21 37748991 22 79692054 23 167772462 24 352321863 25 738197857 26 1543504252 27 3221225880 28 6710886837