A277823 a(n) = A048724(A065621(n)).

3, 6, 9, 12, 23, 18, 29, 24, 43, 46, 33, 36, 63, 58, 53, 48, 83, 86, 89, 92, 71, 66, 77, 72, 123, 126, 113, 116, 111, 106, 101, 96, 163, 166, 169, 172, 183, 178, 189, 184, 139, 142, 129, 132, 159, 154, 149, 144, 243, 246, 249, 252, 231, 226, 237, 232, 219, 222, 209, 212, 207, 202, 197, 192, 323, 326, 329, 332, 343, 338, 349, 344, 363, 366, 353

Offset: 1

Author

Antti Karttunen, Nov 01 2016

Keywords

• nonn
• base

Links

• Antti Karttunen, Table of n, a(n) for n = 1..8192
• Index entries for sequences related to binary expansion of n

Crossrefs

Cf. A048720, A065621.

Column 2 of A277820.

Column 3 of A277320.

Programs

Python

def A277823(n): return (m:=n^ (n&~-n)<<1)^m<<1 # Chai Wah Wu, Jun 29 2022

Scheme

(define (A277823 n) (A048724 (A065621 n)))
(define (A277823 n) (A048720bi (A065621 n) 3))
(define (A277823 n) (A277320bi n 3))

Formula

a(n) = A048724(A065621(n)).

a(n) = A277320(n,3) = A048720(A065621(n),3).