

A068667


a(1) = 7; a(n) = smallest palindromic multiple of a(n1).


9



7, 77, 616, 6776, 88088, 616616, 232464232, 21154245112, 232696696232, 21175399357112, 21154245133154245112, 232696696464696696232, 21175399378287399357112, 63386501441764911946714410568336
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..14.


MATHEMATICA

a[1] = 7; a[n_] := a[n] = Block[{k = 2}, While[k*a[n  1] != ToExpression[ StringReverse[ ToString[k*a[n  1]]]], k++ ]; k*a[n  1]]; Table[a[n], {n, 1, 14}]


CROSSREFS

Cf. A068664 (from a(6) on) and this sequence (from a(3) on) coincide.
Cf. A068664, A068665, A068666, A068668, A070069, A068971, A068972, A068973, A068974.
Sequence in context: A292737 A213261 A268958 * A261741 A228414 A043042
Adjacent sequences: A068664 A068665 A068666 * A068668 A068669 A068670


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Mar 01 2002


EXTENSIONS

Last two terms from David W. Wilson, Sascha Kurz and edited by Patrick De Geest, Mar 30 2002


STATUS

approved



