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Search: id:A070069
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| A070069 |
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a(1) = 11; a(n) = smallest palindromic multiple of a(n-1). |
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+0
6
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| 11, 22, 44, 88, 616, 6776, 88088, 616616, 232464232, 21154245112, 232696696232, 21175399357112, 21154245133154245112, 232696696464696696232, 21175399378287399357112, 63386501441764911946714410568336
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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e[1] = 11; 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, 12}]
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CROSSREFS
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Cf. A068664 (from a(5) on) and this sequence (from a(4) on) coincide.
Cf. A068664, A068665, A068666, A068667, A068668, A068971, A068972, A068973, A068974.
Sequence in context: A122613 A115768 A005015 this_sequence A109687 A111696 A047902
Adjacent sequences: A070066 A070067 A070068 this_sequence A070070 A070071 A070072
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 19 2002
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