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A068668 a(1) = 9; a(n) = smallest palindromic multiple of a(n-1). 7
9, 99, 1881, 171171, 1882881, 306909603, 11355655311, 1033364633301, 1034397997934301, 10241574577547514201, 10231343244544544234313201, 112544775689989986577445211, 1023144555797698967975554413201, 102221350448336861989168633844053122201, 11233003103852144358833233885344125830130033211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..15.

MATHEMATICA

e[1] = 9; e[n_] := e[n] = Block[{k = 2}, While[k*e[n - 1] != ToExpression[ StringReverse[ ToString[k*e[n - 1]]]], k++ ]; k*e[n - 1]]; Table[e[n], {n, 1, 13}] - Robert G. Wilson v, Apr 19 2002

CROSSREFS

Cf. A068664, A068665, A068666, A068667, A070069, A068971, A068972, A068973, A068974.

Sequence in context: A215243 A113395 A070068 * A035027 A196487 A262540

Adjacent sequences:  A068665 A068666 A068667 * A068669 A068670 A068671

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Mar 01 2002

EXTENSIONS

More terms from Sascha Kurz, Mar 27 2002

Edited by N. J. A. Sloane, Apr 19 2007

a(14)-a(15) from Giovanni Resta, Sep 25 2019

STATUS

approved

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Last modified July 10 15:45 EDT 2020. Contains 335577 sequences. (Running on oeis4.)