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A092359 Let R_{k}(m) = the digit reversal of m in base k (R_{k}(m) is written in base 10). a(n) is the smallest y such that there are exactly n bases {k} (k >= 2 and (x < y)) solutions of the equation: R_{k}(x) = y and R_{k}(y) = x. +0
1
7, 19, 61, 193 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(2)=19 because there are two solutions: R_{3}(11) = 19 and R_{3}(19) = 11, R_{9}(11) = 19 and R_{9}(19) = 11.

CROSSREFS

Cf. A004086, A030101-A030108, A056960-A056963, A037183, A091974.

Sequence in context: A126361 A069005 A000413 this_sequence A046137 A121825 A122484

Adjacent sequences: A092356 A092357 A092358 this_sequence A092360 A092361 A092362

KEYWORD

more,nonn,bref

AUTHOR

Naohiro Nomoto (pcmusume(AT)m11.alpha-net.ne.jp), Mar 18 2004

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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