a(n) = floor(1/(n-1) * Sum_{k=1..n-1} a(k)^(n/k)), given a(0)=1, a(1)=2, a(2)=6.

Terms

a(0) =1a(1) =2a(2) =6a(3) =11a(4) =25a(5) =57a(6) =130a(7) =297a(8) =678a(9) =1548a(10) =3537a(11) =8089a(12) =18513a(13) =42401a(14) =97180a(15) =222886a(16) =511541a(17) =1174805a(18) =2699825a(19) =6208514a(20) =14286332a(21) =32895382a(22) =75793307a(23) =174747004a(24) =403156146a(25) =930729690a(26) =2150121210a(27) =4970430222a(28) =11497923316a(29) =26615954928