# A034274 (b-file synthesized from sequence entry) 1 5 2 25 3 119 4 546 5 2442 6 10725 7 46475 8 199342 9 848198 10 3585946 11 15080870 12 63146500 13 263432340 14 1095517485 15 4543460595 16 18798494550 17 77616288750 18 319874637390 19 1316106144210 20 5407045011420 21 22184521682700 22 90910797617250 23 372137346502974