# A149202 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 39 5 127 6 509 7 1897 8 7749 9 31147 10 130112 11 545708 12 2331309 13 10037789 14 43719016 15 191747526 16 848165641 17 3773572327 18 16898460414 19 76053411328 20 344014622051 21 1562892747417 22 7129247628225 23 32642193164425 24 149968165632697 25 691188094597787 26 3195018422360210 27 14809239529907368