# A229491 (b-file synthesized from sequence entry) 0 1 1 0 2 6 3 12 4 30 5 42 6 45 7 75 8 126 9 105 10 175 11 135 12 255 13 195 14 285 15 345 16 435 17 315 18 693 19 405 20 525 21 765 22 585