# A077823 (b-file synthesized from sequence entry) 0 1 1 4 2 15 3 57 4 214 5 802 6 3006 7 11265 8 42214 9 158191 10 592797 11 2221416 12 8324416 13 31194472 14 116896497 15 438051684 16 1641531463 17 6151387249 18 23051379726 19 86381508066 20 323701445398 21 1213021491505 22 4545611889510 23 17033982987735 24 63832237216741 25 239201513294224