A083151 a(1) = 5, 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.
5, 505, 5555, 505505, 5005005005, 55055055055, 50155155155105, 5464353998993534645, 541025148469303964841520145, 513016415223221833242338122322514610315, 5130164152232218845439796446446979345488122322514610315
Offset: 1
Links
- P. De Geest, WONplate 36
Extensions
More terms from Patrick De Geest, Jun 05 2003
a(5)-a(9) corrected by Giovanni Resta, Sep 22 2019
a(10) from David A. Corneth, Sep 22 2019
a(11) from Giovanni Resta, Sep 24 2019
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