A098838 Smith cubic numbers.

27, 729, 19683, 474552, 7077888, 7414875, 8489664, 62099136, 112678587, 236029032, 246491883, 257259456, 279726264, 345948408, 463684824, 567663552, 638277381, 721734273, 766060875, 988047936, 1177583616, 1412467848, 2131746903, 2493326016, 2714704875

Offset

1,1

Links

Donovan Johnson, Table of n, a(n) for n = 1..10000

Example

a(1) = 27 because 27 is a Smith number as well as a cube.

Mathematica

d[n_]:=IntegerDigits[n]; tr[n_]:=Transpose[FactorInteger[n]]; t={}; Do[If[!PrimeQ[n]&&Total[d[n]]==Total[d@tr[n][[1]]*tr[n][[2]], 2], AppendTo[t, n]], {n, Range[2, 1400]^3}]; t (* Jayanta Basu, Jun 04 2013 *)

Crossrefs

Cf. A006753.

Sequence in context: A223571 A228973 A171301 * A268015 A009971 A307388

Adjacent sequences: A098835 A098836 A098837 * A098839 A098840 A098841

Keyword

base,nonn

Author

Shyam Sunder Gupta, Oct 10 2004

Status

approved