# A257490 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 1 5 15 6 15 7 1 8 28 9 35 10 210 11 105 12 1 13 45 14 210 15 630 16 1575 17 3150 18 945 19 1 20 66 21 495 22 462 23 1485 24 13860 25 5775 26 13860 27 51975 28 51975 29 10395 30 1 31 91 32 1001 33 3003 34 3003 35 45045 36 42042 37 105105 38 45045 39 630630 40 525525 41 315315 42 1576575 43 945945 44 135135