# A261636 (b-file synthesized from sequence entry) 0 1 1 4 2 10 3 20 4 35 5 60 6 100 7 160 8 245 9 364 10 536 11 780 12 1115 13 1564 14 2166 15 2980 16 4065 17 5484 18 7326 19 9720 20 12830 21 16824 22 21902 23 28344 24 36510 25 46820 26 59736 27 75844 28 95910 29 120844 30 151688 31 189668 32 236330 33 293564 34 363542 35 448804 36 552425 37 678144 38 830338 39 1014052 40 1235296