login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A329493 (Sum of digits of (2^n - 11)) - n. 3
1, -2, 2, 2, 3, -3, -5, 1, 5, 5, 6, 9, 7, -5, -1, 8, 9, 3, 10, 25, 11, 2, 12, 6, 13, 10, 5, 14, 24, 27, 25, 22, 26, 17, 27, 30, 19, 7, 11, 20, 12, 15, 22, 19, 23, 14, 24, 27, 25, 22, 26, 35, 27, 21, 10, 16, 20, 11, 30, 33, 22, 19, 41, 41, 33, 18, -2, 13, 35, 35, 54, 48, 28, 25, 20, 29, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

COMMENTS

Is this ever zero? If not, this would prove that A329492(11) = -1, and that A328882 is never -11. (-11 is the first negative open case.)

LINKS

Robert Israel, Table of n, a(n) for n = 4..10000

MAPLE

f:= proc(n) convert(convert(2^n-11, base, 10), `+`)-n end proc:

map(f, [$4..100]); # Robert Israel, Nov 17 2019

CROSSREFS

Cf. A328882, A329002, A329492.

Sequence in context: A275247 A293440 A237121 * A139821 A248972 A077563

Adjacent sequences:  A329490 A329491 A329492 * A329494 A329495 A329496

KEYWORD

sign,base

AUTHOR

N. J. A. Sloane, Nov 16 2019

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 24 07:28 EDT 2020. Contains 337317 sequences. (Running on oeis4.)