# A024391 (b-file synthesized from sequence entry) 1 10 2 66 3 231 4 595 5 1275 6 2415 7 4186 8 6786 9 10440 10 15400 11 21945 12 30381 13 41041 14 54285 15 70500 16 90100 17 113526 18 141246 19 173755 20 211575 21 255255 22 305371 23 362526 24 427350 25 500500 26 582660 27 674541 28 776881 29 890445 30 1016025 31 1154440 32 1306536 33 1473186 34 1655290