# A367114 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 17 5 42 6 124 7 408 8 1380 9 4616 10 15184 11 49568 12 162518 13 539580 14 1818184 15 6203088 16 21339916 17 73776024 18 255853744 19 889678688 20 3102779785 21 10856555130 22 38115293308 23 134243564056 24 474159194316 25 1678926445272 26 5957812156144 27 21183679310048