# A018149 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 5 4 8 5 12 6 20 7 33 8 54 9 88 10 144 11 237 12 390 13 640 14 1052 15 1728 16 2841 17 4669 18 7675 19 12616 20 20736 21 34085 22 56028 23 92095 24 151381 25 248832 26 409019 27 672325 28 1105135 29 1816567 30 2985984 31 4908217 32 8067891