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A083149
a(1) = 3, 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.
6
3, 6, 222, 444, 888, 21312, 42624, 468864, 40322304, 80644608, 802494494208, 213525880454088525312, 213525880454088738837880454088525312
OFFSET
1,1
COMMENTS
Multiplier for a(12) is larger than 2000000000.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 25 2003
EXTENSIONS
More terms from Patrick De Geest, Jun 05 2003
a(13) from Giovanni Resta, Sep 22 2019
STATUS
approved