# A013636 (b-file synthesized from sequence entry) 0 0 1 2 2 6 3 15 4 20 5 35 6 42 7 77 8 88 9 99 10 110 11 143 12 156 13 221 14 238 15 255 16 272 17 323 18 342 19 437 20 460 21 483 22 506 23 667 24 696 25 725 26 754 27 783 28 812 29 899 30 930 31 1147 32 1184 33 1221 34 1258 35 1295 36 1332 37 1517 38 1558 39 1599 40 1640 41 1763