# A026722 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 6 4 21 5 34 6 113 7 188 8 607 9 1023 10 3246 11 5509 12 17290 13 29465 14 91820 15 156878 16 486549 17 832671 18 2574116 19 4410189 20 13602994 21 23323442 22 71826377 23 123216902 24 379031585 25 650462028 26 1999308247 27 3431941721 28 10542607578 29 18100449404