# A025267 (b-file synthesized from sequence entry) 1 1 2 -1 3 1 4 3 5 4 6 3 7 4 8 19 9 60 10 124 11 214 12 455 13 1266 14 3404 15 7974 16 17699 17 42050 18 107956 19 276534 20 680140 21 1647872 22 4082562 23 10366604 24 26363583 25 66318590 26 166265630 27 420151570 28 1070885100 29 2734066540 30 6964626146 31 17739885228 32 45334834067 33 116258144838