# A015641 (b-file synthesized from sequence entry) 2 0 3 0 4 0 5 0 6 1 7 6 8 21 9 56 10 125 11 251 12 456 13 786 14 1266 15 1980 16 2946 17 4311 18 6056 19 8436 20 11370 21 15231 22 19866 23 25851 24 32801 25 41655 26 51786 27 64366 28 78601 29 96151 30 115495 31 139246 32 165286 33 196541 34 230681 35 271585 36 315256 37 367616 38 423461 39 489011