a(n) = floor(1/(n-1) * Sum_{k=1..n-1} a(k)^(n/k)), given a(0)=1, a(1)=2, a(2)=7.

Terms

a(0) =1a(1) =2a(2) =7a(3) =13a(4) =31a(5) =76a(6) =185a(7) =451a(8) =1101a(9) =2687a(10) =6569a(11) =16075a(12) =39384a(13) =96594a(14) =237159a(15) =582883a(16) =1434067a(17) =3531851a(18) =8707217a(19) =21488269a(20) =53084814a(21) =131276885a(22) =324981011a(23) =805345637a(24) =1997855718a(25) =4961422706a(26) =12334208641a(27) =30695995780a(28) =76475032893