# A071722 (b-file synthesized from sequence entry) 0 1 1 3 2 10 3 33 4 110 5 372 6 1276 7 4433 8 15574 9 55250 10 197676 11 712538 12 2585292 13 9434830 14 34610400 15 127553745 16 472055910 17 1753616370 18 6536826780 19 24443315550 20 91664179620 21 344655239760 22 1299052403688 23 4907335827258 24 18576824685820