# A291292 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 10 5 34 6 116 7 396 8 1353 9 4631 10 15895 11 54757 12 189465 13 658835 14 2303381 15 8098783 16 28642314 17 101894922 18 364614216 19 1312191768 20 4748561094 21 17275277322 22 63163858146 23 232041604038 24 856219298484 25 3172442815476 26 11799466553232 27 44041859928944 28 164924424558532 29 619454123593948