OFFSET
1,4
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..10000
MATHEMATICA
Array[Mod[Total[IntegerDigits[13^#]], #]&, 1000]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Dec 03 2010
STATUS
approved