# A048043 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 2 7 10 8 15 9 45 10 105 11 140 12 286 13 558 14 720 15 1500 16 3300 17 4455 18 10415 19 23855 20 32487 21 73255 22 160615 23 216580 24 476910 25 1047438 26 1418514 27 3181482 28 7110522 29 9690000 30 21851202 31 48767082 32 66481107 33 149093417 34 331877557