# A150106 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 19 4 69 5 258 6 1009 7 4051 8 16620 9 69339 10 293485 11 1255837 12 5427580 13 23650266 14 103780197 15 458260421 16 2034519989 17 9075959960 18 40663040317 19 182882049074 20 825372922736 21 3736795149850 22 16966383950246 23 77235724826460 24 352445379796634 25 1611854862549043 26 7386683542925906 27 33915357128568520