Illustration of Viswanath's constant A078416.

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =32a(5) =82a(6) =196a(7) =464a(8) =1142a(9) =2746a(10) =6576a(11) =15976a(12) =38484a(13) =92544a(14) =223790a(15) =539402a(16) =1299184a(17) =3136178a(18) =7560760a(19) =18222032a(20) =43956888a(21) =105980632a(22) =255487040a(23) =616137680a(24) =1485562228a(25) =3581617536a(26) =8636505982a(27) =20823634954a(28) =50206996848