A082776 a(1) = 1, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

1, 11, 121, 12221, 12233221, 122344443221, 15223441414432251, 15223441429655692414432251

Offset: 1

Author

Amarnath Murthy, Apr 19 2003

Keywords

• base
• nonn
• more

Comments

a(n)<=(10^A055642(a(n-1))+1)*a(n-1). If a(n-1) > 10 and the last digit of a(n-1) <= 4, then a(n)<=(10^(A055642(a(n-1))-1)+1)*a(n-1). - Chai Wah Wu, Mar 06 2021

Crossrefs

Cf. A055642, A082777, A082778, A082779, A082780.

Extensions

Corrected by Ray Chandler, Oct 13 2003

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