# A132837 (b-file synthesized from sequence entry) 0 1 1 4 2 14 3 56 4 221 5 884 6 3534 7 14136 8 56542 9 226168 10 904672 11 3618688 12 14474751 13 57899004 14 231596014 15 926384056 16 3705536222 17 14822144888 18 59288579552 19 237154318208 20 948617272832 21 3794469091328 22 15177876365312 23 60711505461248