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A216906 Smallest palindromic number of length 12 in two bases differing by n. 15
248876637484140, 1013960892216384, 1093158208940760, 101975569769446364, 16699985993414520, 1310809863419914830, 331113952227684640 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

See comments in A216840, A216841. Smaller of pair of bases are 17, 20, 19, 28, 23.  A216*** cross-references are other sequences in a collection that includes this one, while A171*** sequences are various record multi-base palindromes.

LINKS

Table of n, a(n) for n=2..8.

EXAMPLE

The first term is 747B6336B747 in base 17 and 22B4I88I4B22 in base 19.

CROSSREFS

Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741, A171742, A171775, A216840, A216841, A216843, A216899, A216900, A216901, A216902, A216903, A216904, A216905, A216907, A216908, A216909, A216910.

Sequence in context: A295354 A086439 A086440 * A229383 A172596 A121111

Adjacent sequences:  A216903 A216904 A216905 * A216907 A216908 A216909

KEYWORD

nonn,base

AUTHOR

James G. Merickel, Sep 19 2012

EXTENSIONS

a(7)-a(8) from Chai Wah Wu, Aug 19 2015

STATUS

approved

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Last modified December 13 17:37 EST 2019. Contains 329970 sequences. (Running on oeis4.)