A082780 a(1) = 5, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

5, 55, 5005, 505505, 5005005005, 50055055055005, 50005050055005050005, 5000005005005005005005000005, 50000050055050055055055005055005000005, 500050050050555055050555055505550555050550555050050050005

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082781, A082782, A082783.

Sequence in context: A111821 A275546 A068666 * A063855 A376767 A081785

Adjacent sequences: A082777 A082778 A082779 * A082781 A082782 A082783

Keyword

base,nonn,changed

Author

Amarnath Murthy, Apr 19 2003

Extensions

Corrected by Ray Chandler, Oct 13 2003

a(8)-a(9) from Sean A. Irvine, Apr 19 2010

a(10) from Max Alekseyev, May 28 2026

Status

approved