A051123 a(n) = Fibonacci(n) OR Fibonacci(n+1).

1, 1, 3, 3, 7, 13, 13, 29, 55, 55, 127, 217, 249, 505, 891, 1019, 2047, 3645, 6749, 6781, 15087, 28655, 28671, 65521, 111921, 130865, 262003, 458611, 514551, 1047229, 1882877, 3522525, 3538919, 7849959, 14666991, 15719929, 32759801

Offset

0,3

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Example

Fibonacci(6) = 8 = 1000_2, Fibonacci(7) = 13 = 1101_2, logical "OR" is 1101_2 = 13, so a(6)=13.

Mathematica

BitOr@@#&/@Partition[Fibonacci[Range[0, 40]], 2, 1] (* Harvey P. Dale, Apr 15 2026 *)

Prog

(PARI)  a(n) = bitor(fibonacci(n), fibonacci(n+1)); \\ Michel Marcus, Mar 06 2020

Crossrefs

A051122 + A051124 = A051123.

Sequence in context: A177942 A360873 A116880 * A096188 A187873 A306665

Adjacent sequences: A051120 A051121 A051122 * A051124 A051125 A051126

Keyword

nonn,easy,base

Author

N. J. A. Sloane

Extensions

More terms from Robert Lozyniak (11(AT)onna.com)

Status

approved