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

0,1

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

Prog

(PARI) See Links section.

Crossrefs

Cf. A228407.

Sequence in context: A255966 A305396 A266717 * A303573 A050661 A282115

Adjacent sequences: A303568 A303569 A303570 * A303572 A303573 A303574

Keyword

nonn,base

Author

N. J. A. Sloane, Apr 27 2018

Extensions

More terms from Rémy Sigrist, Dec 27 2018

Status

approved