# A094957 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 10 5 30 6 101 7 370 8 1459 9 6161 10 27741 11 132621 12 670444 13 3571013 14 19975956 15 117026702 16 716199026 17 4568532550 18 30313253547 19 208834580360 20 1491280419431 21 11021454603693 22 84184429969735 23 663707628683503