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A216909 Smallest palindromic number of length 15 in two bases differing by n. 15
4712469842177, 14192598568359611, 389035682624908873, 11713091929744317938, 110566060844648951845 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See comments to A216840 and A216841.  Smaller of pair of bases are 7, 12, 15, 19, 22.  A216*** sequences in cross-reference are others in a collection including this one, while A171*** ones are various multi-base palindrome records.

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

The first term is 664315252513466 in base 7 and 104446505644401 in base 8.

CROSSREFS

Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741, A171742, A171775, A216840, A216841, A216843, A216899, A216900, A216901, A216902, A216903, A216904, A216905, A216906, A216907, A216908, A216910.

Sequence in context: A139574 A233625 A237361 * A173710 A258275 A324206

Adjacent sequences:  A216906 A216907 A216908 * A216910 A216911 A216912

KEYWORD

nonn,base

AUTHOR

James G. Merickel, Sep 19 2012

STATUS

approved

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Last modified July 28 14:19 EDT 2021. Contains 346335 sequences. (Running on oeis4.)