# A034343 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 8 5 16 6 36 7 80 8 194 9 506 10 1449 11 4631 12 17106 13 74820 14 404283 15 2815595 16 26390082 17 344330452 18 6365590987 19 167062019455 20 6182453531508 21 319847262335488 22 22968149462624180 23 2277881694784784852