# A036624 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 4 5 9 6 20 7 48 8 113 9 275 10 667 11 1627 12 3951 13 9597 14 23215 15 56063 16 134982 17 324340 18 777492 19 1860365 20 4442905 21 10593324 22 25217480 23 59944219 24 142295011 25 337344737 26 798769090 27 1889131816 28 4462891151 29 10531873564 30 24828302752