# A307401 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 8 4 26 5 92 6 360 7 1416 8 5698 9 23513 10 98346 11 416418 12 1783144 13 7704322 14 33546344 15 147071592 16 648636050 17 2875822121 18 12810531924 19 57306505152 20 257330920910 21 1159517118330 22 5241137123470 23 23758569938458 24 107983949179512 25 491985193384077 26 2246564114646650