# A148667 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 19 5 60 6 169 7 539 8 1713 9 5412 10 18241 11 58932 12 197794 13 670464 14 2252141 15 7793403 16 26523661 17 91645156 18 319356023 19 1106651892 20 3895231214 21 13604856592 22 47889319173 23 169562551244 24 598458138702 25 2132024158112 26 7562668836374 27 26957742010368 28 96480822451924 29 344633309569472 30 1238725757557789