# A034717 (b-file synthesized from sequence entry) 1 1 2 4 3 10 4 32 5 84 6 284 7 858 8 2916 9 9749 10 33760 11 117572 12 416692 13 1485800 14 5350596 15 19390110 16 70721256 17 259289580 18 955298168 19 3534526380 20 13128309200 21 48932538330 22 182965362424 23 686119227300 24 2579809144692 25 9723892804668