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A216909
Smallest palindromic number of length 15 in two bases differing by n.
15
4712469842177, 14192598568359611, 389035682624908873, 11713091929744317938, 110566060844648951845
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.
EXAMPLE
The first term is 664315252513466 in base 7 and 104446505644401 in base 8.
KEYWORD
nonn,base
AUTHOR
James G. Merickel, Sep 19 2012
STATUS
approved