A083155 a(1) = 9, a(n) = smallest nontrivial palindromic multiple of a(n-1). a(n) is not equal to a(n-1) or a concatenation of a(n-1) with itself.

9, 171, 1881, 171171, 1882881, 306909603, 11355655311, 1033364633301, 1034397997934301, 10241574577547514201, 10231343244544544234313201, 112544775689989986577445211, 1023144555797698967975554413201, 102221350448336861989168633844053122201, 11233003103852144358833233885344125830130033211

Offset

1,1

Comments

Variant of A068668. [From R. J. Mathar, Dec 15 2008]

Links

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

P. De Geest, WONplate 36

Crossrefs

Cf. A083156, A068668, A083153, A083151, A083149, A083147.

Sequence in context: A121476 A121477 A055407 * A229127 A358620 A358959

Adjacent sequences: A083152 A083153 A083154 * A083156 A083157 A083158

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 25 2003

Extensions

Corrected and extended by Patrick De Geest, Jun 05 2003

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

Status

approved