# A098730 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 14 4 46 5 145 6 462 7 1465 8 4641 9 14671 10 46298 11 145858 12 458811 13 1441204 14 4521255 15 14167145 16 44344445 17 138665650 18 433218100 19 1352333899 20 4218220602 21 13148256139 22 40956562683 23 127501720725 24 396702130246 25 1233632920766