# A189565 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 12 5 36 6 174 7 708 8 4334 9 31424 10 263732 11 2503296 12 26844578 13 316692056 14 4090634212 15 57274447458 16 863488976620