# A018120 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 3 6 3 7 4 8 5 9 7 10 9 11 11 12 13 13 17 14 21 15 27 16 33 17 41 18 52 19 65 20 81 21 100 22 125 23 156 24 195 25 243 26 302 27 377 28 469 29 585 30 729 31 908 32 1131 33 1409 34 1755 35 2187 36 2724 37 3393 38 4227 39 5266 40 6561 41 8173 42 10181 43 12683 44 15800 45 19683