# A108600 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 20 5 71 6 260 7 971 8 3674 9 14032 10 53968 11 208692 12 810492 13 3158760 14 12346628 15 48377494 16 189952216 17 747180999 18 2943648824 19 11612917815 20 45869337526 21 181372345723 22 717856746216 23 2843678131629 24 11273602645942 25 44725291921541