# A151415 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 10 5 27 6 89 7 267 8 868 9 2858 10 9510 11 31830 12 108638 13 373219 14 1288064 15 4482534 16 15710368 17 55258931 18 195240700 19 693284513 20 2470263132 21 8827776270 22 31654190580 23 113835950410 24 410335021648 25 1482638356348 26 5369592056146 27 19484896375080 28 70835100481126 29 257981797359638 30 941120763934455 31 3438343699103345