# A121718 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 13 4 24 5 36 6 56 7 77 8 99 9 199 10 300 11 402 12 512 13 623 14 735 15 855 16 976 17 1098 18 1298 19 1499 20 1701 21 1911 22 2122 23 2334 24 2554 25 2775 26 2997 27 3997 28 4998 29 6000 30 7010 31 8021 32 9033 33 10053 34 11074 35 12096 36 13196 37 14297 38 15399 39 16509 40 17620 41 18732 42 19852 43 20973 44 22095