A066133 Numbers that in base 2 need twelve 'Reverse and Add' steps to reach a palindrome.

1027, 1139, 1181, 1229, 1433, 1481, 1537, 1649, 1951, 1983, 1999, 2031, 2051, 3073, 3103, 3215, 3351, 3463, 3611, 3639, 3671, 3723, 3751, 3783, 3839, 3859, 3971, 4087, 4103, 4121, 4141, 4187, 4237, 4269, 4327, 4331, 4333, 4361, 4427, 4603, 4625, 4645

Offset

1,1

Comments

The analog of A065217 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.

Numbers k such that A066057(k) = 12. - Andrew Howroyd, Dec 05 2024

Links

Harry J. Smith, Table of n, a(n) for n=1..1000

Index entries for sequences related to Reverse and Add!

Prog

(PARI) isok(n, s=12)={for(k=0, s, my(r=fromdigits(Vecrev(binary(n)), 2)); if(r==n, return(k==s)); n += r); 0} \\ Andrew Howroyd, Dec 05 2024

Crossrefs

Cf. A006995, A065217, A066057, A066122.

Sequence in context: A246245 A235692 A247947 * A119455 A252772 A168189

Adjacent sequences: A066130 A066131 A066132 * A066134 A066135 A066136

Keyword

base,nonn

Author

Klaus Brockhaus, Dec 08 2001

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

Status

approved