# A148491 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 21 5 79 6 308 7 1230 8 5122 9 21917 10 95429 11 420388 12 1874468 13 8451916 14 38469785 15 176364014 16 813412342 17 3772468146 18 17586034802 19 82346756679 20 387060294933 21 1825485662648 22 8636347518082 23 40975310094819 24 194907689107949 25 929256234842093 26 4439720262125077 27 21253098983214205 28 101922815438706386