A067500 Powers of 3 with digit sum also a power of 3.

1, 3, 9, 27, 81, 243, 19683, 59049, 177147, 1594323, 43046721, 129140163, 10460353203, 7625597484987, 617673396283947, 50031545098999707, 150094635296999121, 4052555153018976267

Offset

1,2

Comments

a(n) = 3^A118872(n).

Links

Table of n, a(n) for n=1..18.

Mathematica

With[{l3s=3^Range[0, 200]}, Select[l3s, MemberQ[l3s, Total[IntegerDigits[ #]]]&]] (* Harvey P. Dale, May 20 2011 *)

Crossrefs

Cf. A067499.

Cf. A004166, A000244.

Sequence in context: A351345 A351344 A079846 * A273898 A351343 A078226

Adjacent sequences: A067497 A067498 A067499 * A067501 A067502 A067503

Keyword

base,easy,nonn

Author

Amarnath Murthy, Feb 11 2002

Extensions

More terms from Harvey P. Dale, Mar 02 2002

Offset corrected by Reinhard Zumkeller, May 14 2011

Status

approved