A065325 78 'Reverse and Add' steps are needed to reach a palindrome.

1000689, 1009617, 1010589, 1019517, 1020489, 1029417, 1030389, 1039317, 1040289, 1049217, 1050189, 1059117, 1060089, 1060989, 1069017, 1070889, 1080789, 1090689, 1100679, 1109607, 1110579, 1119507, 1120479, 1129407

Offset

0,1

Comments

The number of steps starts at 0, so palindromes (cf. A002113) are excluded. 78 is a record (cf. A065199) of the number of 'Reverse and Add' steps needed to reach a palindrome.

First term not congruent to 15 mod 18 is a(135) = 2000688, thereafter residues 6 and 15 appear in larger clusters; first residue different from 15 and 6 is at a(1215) = 16902780. - Klaus Brockhaus, Jul 14 2003

Links

Table of n, a(n) for n=0..23.

Index entries for sequences related to Reverse and Add!

Crossrefs

Cf. A002113, A065198, A065199, A065318.

Sequence in context: A227111 A227137 A096212 * A245210 A357098 A250698

Adjacent sequences: A065322 A065323 A065324 * A065326 A065327 A065328

Keyword

base,nonn

Author

Klaus Brockhaus, Oct 30 2001

Status

approved