# A034774 (b-file synthesized from sequence entry) 1 1 2 3 3 4 4 10 5 16 6 52 7 134 8 446 9 1437 10 4896 11 16798 12 58896 13 208014 14 743170 15 2674476 16 9695727 17 35357672 18 129647751 19 477638702 20 1767272976 21 6564120692 22 24466300618 23 91482563642 24 343059732248 25 1289904147355 26 4861946817482