# A149404 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 12 4 52 5 177 6 807 7 3041 8 14268 9 56590 10 270028 11 1106952 12 5339922 13 22402560 14 108879743 15 464602037 16 2270119906 17 9813344344 18 48139440999 19 210239624137 20 1034441748942 21 4555286272410 22 22466061317387 23 99610665420191 24 492185173300521 25 2194832280561287 26 10861273254989284 27 48671943604817077