# A335029 (b-file synthesized from sequence entry) 1 3 2 9 3 10 4 44 5 70 6 225 7 315 8 770 9 1575 10 2835 11 3465 12 10010 13 17325 14 31185 15 45045 16 121275 17 135135 18 225225 19 405405 20 675675 21 1576575 22 2027025 23 2297295 24 3828825 25 6891885 26 11486475 27 26801775 28 34459425 29 43648605 30 72747675 31 130945815 32 218243025 33 509233725 34 654729075 35 1003917915