A048373 a(n)^3 is smallest cube containing exactly n 8's.

2, 42, 92, 436, 942, 2402, 16942, 52942, 266192, 2018892, 3069442, 14242355, 44559402, 207156367, 206524022, 2663151915, 5415821442, 7298885092, 33777876942, 441138374692, 1690359374442, 1316916061361

Offset: 1

Author

Patrick De Geest, Mar 15 1999

Keywords

• nonn
• base
• more

Links

• Eric Weisstein's World of Mathematics, Cubic Number

Crossrefs

Cf. A036535, A048365, A048366, A048367, A048368, A048369, A048370, A048371, A048372, A048374.

Programs

Mathematica

a[n_] := Module[{i = 0}, While[DigitCount[i^3][[8]] != n, i++ ]; i] (* Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 29 2006 *)

Extensions

a(14) from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 29 2006

a(15)-a(20) from Lars Blomberg, Jun 12 2011

a(21)-a(22) from Giovanni Resta, Jun 29 2018