# A148317 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 39 6 125 7 393 8 1338 9 4568 10 16140 11 57955 12 211441 13 784037 14 2938223 15 11144377 16 42656950 17 164683455 18 640849659 19 2510334400 20 9898182076 21 39244156602 22 156425354900 23 626478426609 24 2520086142119 25 10179070688974 26 41269184569820 27 167910469044899 28 685397571233314 29 2806297972718526