A083147 a(1) = 1, 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.

1, 2, 4, 8, 232, 464, 42224, 84448, 4053504, 44588544, 4057557504, 4053504004053504, 44588544044588544, 4057557508057557504, 401341233733484337332143104, 40130110362352332623325326301103104, 441431213985875658856578589312134144

Offset

1,2

Links

Giovanni Resta, Table of n, a(n) for n = 1..19

P. De Geest, WONplate 36

Crossrefs

Cf. A083148, A068664, A083149, A083151, A083153, A083155.

Sequence in context: A203630 A265595 A133036 * A012648 A130133 A033555

Adjacent sequences: A083144 A083145 A083146 * A083148 A083149 A083150

Keyword

nonn,base

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(17) from Giovanni Resta, Sep 25 2019

Status

approved