# A072810 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 7 5 14 6 25 7 48 8 90 9 168 10 316 11 592 12 1112 13 2086 14 3913 15 7342 16 13775 17 25845 18 48490 19 90978 20 170694 21 320257 22 600867 23 1127352 24 2115147 25 3968453 26 7445640 27 13969562 28 26209794 29 49175002 30 92262491 31 173103549 32 324778120 33 609351037