# A025261 (b-file synthesized from sequence entry) 1 3 2 -2 3 1 4 3 5 7 6 16 7 40 8 111 9 327 10 984 11 2984 12 9120 13 28156 14 87830 15 276442 16 876443 17 2795523 18 8963668 19 28877692 20 93433104 21 303474772 22 989159058 23 3234373630 24 10606540108 25 34874855416 26 114951540690 27 379751773694 28 1257173264286 29 4170000218994