# A003177 (b-file synthesized from sequence entry) 1 24 2 36 3 56 4 90 5 149 6 252 7 436 8 765 9 1363 10 2456 11 4467 12 8190 13 15122 14 28086 15 52428 16 98303 17 185042 18 349524 19 662258 20 1258290 21 2396744 22 4575604 23 8753330 24 16777215 25 32212254 26 61946643 27 119304647 28 230087533