# A014447 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 11 4 29 5 47 6 123 7 199 8 521 9 843 10 2207 11 3571 12 9349 13 15127 14 39603 15 64079 16 167761 17 271443 18 710647 19 1149851 20 3010349 21 4870847 22 12752043 23 20633239 24 54018521 25 87403803 26 228826127 27 370248451 28 969323029 29 1568397607 30 4106118243