A031013 - OEIS

A031013

Position of n-th 5 in A031007.

5, 17, 31, 45, 59, 64, 66, 68, 70, 72, 73, 74, 76, 87, 106, 127, 148, 169, 190, 197, 200, 203, 206, 209, 211, 212, 215, 232, 253, 274, 295, 316, 337, 344, 347, 350, 353, 356, 358, 359, 362, 379, 400, 421, 442, 463, 484, 491, 494

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

MATHEMATICA

Flatten[Position[Flatten[Table[Reverse[IntegerDigits[n, 7]], {n, 0, 200}]], 5]]-1 (* Harvey P. Dale, Feb 25 2014 *)

CROSSREFS

Sequence in context: A272939 A272920 A143798 * A031370 A147434 A147336

Adjacent sequences: A031010 A031011 A031012 * A031014 A031015 A031016

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved