A331589 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A331589

a(n) is the greatest k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

3

1, 3, 5, 7, 9, 13, 15, 17, 21, 25, 29, 27, 31, 33, 41, 49, 45, 57, 53, 51, 61, 59, 63, 65, 73, 81, 97, 89, 85, 105, 113, 101, 93, 121, 99, 109, 117, 107, 115, 125, 123, 119, 127, 129, 145, 161, 153, 177, 169, 193, 165, 185, 209, 201, 225, 181, 197, 217, 241

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..8347

Rémy Sigrist, PARI program for A331589

FORMULA

a(n) = A030101(A331588(n)).

a(n) * A331588(n) = A331587(n).

PROG

(PARI) See Links section.

CROSSREFS

Cf. A030101, A331587, A331588.

Sequence in context: A355773 A119253 A307001 * A063951 A131437 A003553

Adjacent sequences: A331586 A331587 A331588 * A331590 A331591 A331592

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Jan 21 2020

STATUS

approved