# A072898 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 2 4 5 5 13 6 38 7 58 8 191 9 655 10 2374 11 4462 12 17519 13 71063 14 298810 15 646846 16 2887921 17 13237457 18 62332114 19 150303170 20 742458253 21 3748521653 22 19340144966 23 50903810666 24 273315477775 25 1495006933759 26 8327893878134 27 23599037077934