# A097336 (b-file synthesized from sequence entry) 0 1 1 5 2 5 3 21 4 101 5 181 6 517 7 2133 8 5029 9 13301 10 47429 11 127893 12 340709 13 1099573 14 3145861 15 8597205 16 26190373 17 76524149 18 214079429 19 633125397 20 1857511781 21 5282782645 22 15412788997 23 45132977493 24 129657499813 25 376262123765