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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

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

STATUS

approved

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Last modified December 16 17:42 EST 2018. Contains 318172 sequences. (Running on oeis4.)