OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..14
FORMULA
MATHEMATICA
Map[FromDigits[IntegerDigits[#, 4]] &, PerfectNumber[Range[10]]] (* Amiram Eldar, Oct 16 2024 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladislav-Stepan Malakhovsky and Juri-Stepan Gerasimov, May 31 2009
EXTENSIONS
Edited by N. J. A. Sloane, Jun 07 2009
STATUS
approved