

A164700


Base 10 integers n such that n base 7 is a substring of n base 3.


1



0, 1, 2, 357, 358, 359, 449, 450, 2417, 2450, 4901, 5146, 34056, 34301, 36752, 39202, 39207, 151326, 153777, 154022, 156473, 156506, 156751, 6005594, 6605901, 12476003, 12490737, 12492410, 12505208, 12506909, 12622759, 13213405
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OFFSET

1,3


LINKS

Zak Seidov, Table of n, a(n) for n = 1..99


EXAMPLE

a(8)=2417 because 2417 base 10 = 10022 base 7 = 10022112 base 3, and the string 10022 appears in 10022112.


MATHEMATICA

Select[Range[0, 133*10^5], SequenceCount[IntegerDigits[#, 3], IntegerDigits[ #, 7]]>0&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 01 2018 *)


CROSSREFS

Sequence in context: A278926 A187523 A172860 * A230688 A325629 A062381
Adjacent sequences: A164697 A164698 A164699 * A164701 A164702 A164703


KEYWORD

base,easy,nonn


AUTHOR

Gil Broussard, Aug 22 2009


EXTENSIONS

More terms from Zak Seidov, Aug 23 2009


STATUS

approved



