A083153 a(1) = 7, 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.

7, 161, 1771, 161161, 1772771, 414828414, 4107216127014, 45179377397154, 410725719917527014, 210233245545545542332012, 210023222533245542335222320012, 21212345475857799775857454321212, 2100232225542478645885468742455222320012

Offset: 1

Author

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

Keywords

• base
• nonn

Links

• Giovanni Resta, Table of n, a(n) for n = 1..18
• P. De Geest, WONplate 36

Crossrefs

Cf. A083154, A068667, A083147, A083149, A083151, A083155.

Extensions

More terms from Patrick De Geest, Jun 05 2003

a(13) from Giovanni Resta, Sep 25 2019