

A171706


The first nfold intrinsically 7palindromic number (represented in base 10).


25




OFFSET

1,1


COMMENTS

Though this sequence is apt to never have many known members, its third is quite a nice coincidence for consideration.
A029965 runs just short of space to show it, and A053780 is a totally unrelated collection of palindromes that also includes 33633 in addition to 3360633.
a(4) > 10^17.  Hiroaki Yamanouchi, Aug 22 2015


LINKS

Table of n, a(n) for n=1..3.


EXAMPLE

a(2)=186621 is 3555553 in base 6 and 1405041 in base 7.
a(3)=3360633 is 6281826 in base 9 and 1995991 in base 11.


CROSSREFS

Cf. A171701, A171702, A171703, A171704, A171705, A171741, A029966, A029965, A053780.
Sequence in context: A061688 A337808 A218689 * A015072 A015039 A238612
Adjacent sequences: A171703 A171704 A171705 * A171707 A171708 A171709


KEYWORD

more,nonn,bref,base


AUTHOR

James G. Merickel, Dec 16 2009


EXTENSIONS

Typo in third term corrected by James G. Merickel, Dec 18 2009


STATUS

approved



