# A056370 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 1 7 3 8 27 9 171 10 1249 11 8389 12 56078 13 360430 14 2272598 15 14037552 16 85516427 17 514976658 18 3074986236 19 18239677629 20 107654218055 21 632996894925 22 3711499485032 23 21716765203045 24 126880009551584