A303571 a(n) = palindrome arising when A228407(n+1) is formed (if there is more than one, use the smallest).

101, 111, 101, 10001, 10201, 212, 202, 10201, 12021, 232, 313, 1331, 13031, 30103, 10301, 13031, 343, 414, 1441, 14041, 40104, 14041, 14241, 2442, 12421, 12121, 12021, 102201, 102201, 102201, 1002001, 1005001, 15051, 515, 525, 2552, 15251, 15351, 3553, 13531

Offset: 0

Author

N. J. A. Sloane, Apr 27 2018

Keywords

• nonn
• base

Comments

Let A228407(n) = X, A228407(n+1) = Y. The digits of X and Y can be rearranged to form a palindrome, possibly in several ways; a(n) is the smallest such palindrome.

Links

• Rémy Sigrist, Table of n, a(n) for n = 0..29999
• Rémy Sigrist, PARI program for A303571

Crossrefs

Cf. A228407.

Programs

PARI

See Links section.

Extensions

More terms from Rémy Sigrist, Dec 27 2018