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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A277011 Left inverse of A277012. 3
0, 1, 2, 2, 6, 3, 4, 3, 24, 7, 8, 4, 12, 5, 6, 4, 120, 25, 26, 8, 30, 9, 10, 5, 48, 13, 14, 6, 18, 7, 8, 5, 720, 121, 122, 26, 126, 27, 28, 9, 144, 31, 32, 10, 36, 11, 12, 6, 240, 49, 50, 14, 54, 15, 16, 7, 72, 19, 20, 8, 24, 9, 10, 6, 5040, 721, 722, 122, 726, 123, 124, 27, 744, 127, 128, 28, 132, 29, 30, 10, 840, 145, 146, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8191

Index entries for sequences related to binary expansion of n

Index entries for sequences related to factorial base representation

FORMULA

a(n) = A276075(A005940(1+n)).

For all n >= 0, a(A277012(n)) = n.

PROG

(Scheme)

;; Standalone iterative implementation:

(define (A277011 n) (let loop ((s 0) (n n) (r 0) (i 2) (f 1)) (cond ((zero? n) (+ s (* r f))) ((even? n) (loop (+ s (* r f)) (/ n 2) 0 (+ 1 i) (* i f))) (else (loop s (/ (- n 1) 2) (+ 1 r) i f)))))

CROSSREFS

Left inverse of A277012.

Cf. A005940, A276075.

Cf. also A277007.

Sequence in context: A298983 A128623 A182701 * A277021 A275037 A174833

Adjacent sequences:  A277008 A277009 A277010 * A277012 A277013 A277014

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Sep 25 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 29 17:46 EDT 2022. Contains 357090 sequences. (Running on oeis4.)