# A375371 (b-file synthesized from sequence entry) 0 1 1 -1 2 4 3 -1 4 11 5 7 6 35 7 52 8 138 9 267 10 606 11 1266 12 2758 13 5882 14 12679 15 27185 16 58442 17 125473 18 269561 19 578929 20 1243545 21 2670942 22 5736984 23 12322389 24 26467324 25 56849060 26 122106124 27 262271540 28 563332877 29 1209982051 30 2598919376 31 5582216323 32 11990037159 33 25753389147