# A148430 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 19 5 59 6 219 7 774 8 3145 9 11859 10 49307 11 195291 12 833909 13 3407800 14 14788168 15 61947528 16 272400290 17 1162004530 18 5161800599 19 22345394684 20 100082432241 21 438344267322 22 1976663086536 23 8741628318605 24 39643441874273 25 176734752146518 26 805373891611901 27 3614987906351808 28 16541733451593305