A083123 Smallest n-digit palindromic multiple of n, or 0 if no such number exists.

1, 22, 111, 2112, 50005, 201102, 1002001, 21100112, 100070001, 0, 10000200001, 210000000012, 1000029200001, 20000055000002, 500000020000005, 2110000000000112, 10000000200000001, 200000007700000002, 1000000002000000001, 0, 100000000010000000001, 2000000000000000000002

Offset

1,2

Links

Table of n, a(n) for n=1..22.

Formula

a(10*k) = 0. - Sean A. Irvine, Jan 08 2026

Crossrefs

Sequence in context: A381960 A261534 A041938 * A084013 A084017 A089184

Adjacent sequences: A083120 A083121 A083122 * A083124 A083125 A083126

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 23 2003

Extensions

More terms from Keith Schneider, Jun 18 2007

Missing a(10)=0 inserted and more terms from Sean A. Irvine, Jan 08 2026

Status

approved