a(n)^3 is smallest cube containing exactly n 8's.

Terms

a(0) =2a(1) =42a(2) =92a(3) =436a(4) =942a(5) =2402a(6) =16942a(7) =52942a(8) =266192a(9) =2018892a(10) =3069442a(11) =14242355a(12) =44559402a(13) =207156367a(14) =206524022a(15) =2663151915a(16) =5415821442a(17) =7298885092a(18) =33777876942a(19) =441138374692