# A351499 (b-file synthesized from sequence entry) 1 1 2 9 3 15 4 75 5 105 6 315 7 525 8 735 9 945 10 1155 11 1365 12 1575 13 1995 14 3465 15 4305 16 5775 17 6615 18 7035 19 8085 20 8925 21 9765 22 10395 23 11235 24 12495 25 12705 26 13545 27 15015 28 19635 29 26565 30 28875 31 31185 32 33495 33 38115 34 45045 35 255255 36 405405 37 525525 38 765765 39 975975 40 1036035 41 1786785 42 2297295