# A024597 (b-file synthesized from sequence entry) 1 2 2 3 3 11 4 17 5 40 6 56 7 111 8 147 9 265 10 321 11 558 12 674 13 1141 14 1321 15 2195 16 2571 17 4232 18 4876 19 7971 20 8809 21 14343 22 16081 23 26122 24 28426 25 46113 26 49727 27 80587 28 88083 29 142656 30 155902 31 252409 32 271617 33 439653 34 464867 35 752352 36 804854 37 1302473 38 1374265 39 2223813 40 2340937