A065209 Numbers which need four 'Reverse and Add' steps to reach a palindrome.

69, 78, 87, 96, 174, 175, 183, 192, 195, 273, 274, 280, 290, 291, 294, 372, 381, 390, 471, 472, 480, 492, 539, 570, 571, 579, 591, 599, 629, 638, 649, 670, 678, 679, 690, 698, 699, 728, 729, 748, 749, 769, 778, 789, 798, 819, 827, 836, 839, 847, 876, 877

Offset

1,1

Comments

The number of steps starts at 0, so palindromes (cf. A002113) are excluded.

Numbers k such that A033665(k) = 4. - Andrew Howroyd, Dec 06 2024

Links

Andrew Howroyd, Table of n, a(n) for n = 1..10000

Index entries for sequences related to Reverse and Add!

Prog

(PARI) select(k->isok(k, 4), [1..900]) \\ isok defined in A065206. - Andrew Howroyd, Dec 06 2024

Crossrefs

Cf. A002113, A015980, A033665, A065206.

Sequence in context: A210614 A235226 A015980 * A045021 A254712 A197172

Adjacent sequences: A065206 A065207 A065208 * A065210 A065211 A065212

Keyword

nonn,base

Author

Klaus Brockhaus, Oct 21 2001

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Oct 14 2009

Status

approved