# A062107 (b-file synthesized from sequence entry) 1 0 2 1 3 3 4 10 5 30 6 90 7 270 8 810 9 2430 10 7290 11 21870 12 65610 13 196830 14 590490 15 1771470 16 5314410 17 15943230 18 47829690 19 143489070 20 430467210 21 1291401630 22 3874204890 23 11622614670 24 34867844010 25 104603532030 26 313810596090 27 941431788270