

A216901


Smallest palindromic number of 7 digits in two bases differing by n.


16



186621, 532900, 1857351, 9046409, 17439233, 69012421, 146766357, 289744476, 347411351, 390219121, 1200809057, 1393838392, 3088676989, 2383346701, 3333147809, 6041072349, 6819663132, 7822398453, 9534770061, 12359264257, 18701296795, 20196246357, 25763014657
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OFFSET

1,1


COMMENTS

See comments to A216840 and A216841. Smaller of pair of bases are 6, 7, 8, 10, 11, 14, 15, 17, 17, 17. The A216*** crossreferences here are other sequences of this collection, while the A171*** ones are to various multibase record palindromes.


LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..100


EXAMPLE

9046409 is also a 7digit palindrome in base 14 (in addition to decimal). No smaller number is a 7digit palindrome in both of two bases that differ by 4.


CROSSREFS

Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741, A171742, A171775, A216840, A216841, A216843, A216899, A216900, A216902, A216903, A216904, A216905, A216906, A216907, A216908, A216909, A216910.
Sequence in context: A186878 A192103 A203442 * A253293 A253163 A185775
Adjacent sequences: A216898 A216899 A216900 * A216902 A216903 A216904


KEYWORD

nonn,base


AUTHOR

James G. Merickel, Sep 19 2012


EXTENSIONS

More terms from Chai Wah Wu, Aug 16 2015


STATUS

approved



