# A072899 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 5 6 13 7 19 8 58 9 191 10 655 11 1187 12 4462 13 17519 14 71063 15 149405 16 646846 17 2887921 18 13237457 19 31166057 20 150303170 21 742458253 22 3748521653 23 9670072483 24 50903810666 25 273315477775 26 1495006933759 27 4163946939067 28 23599037077934