# A151482 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 28 5 93 6 359 7 1332 8 5400 9 21460 10 89844 11 373197 12 1600682 13 6853799 14 29959582 15 131136020 16 582046108 17 2590492619 18 11642984469 19 52500378935 20 238444506195 21 1086573825315 22 4978762863254 23 22885862700737 24 105659026464329 25 489244652473495 26 2273483149291092 27 10593076963481771 28 49504781707787203