# A018148 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 4 4 7 5 12 6 20 7 32 8 53 9 88 10 144 11 237 12 389 13 640 14 1051 15 1728 16 2840 17 4669 18 7675 19 12615 20 20736 21 34085 22 56027 23 92095 24 151381 25 248832 26 409018 27 672324 28 1105134 29 1816566 30 2985984 31 4908217 32 8067890