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!)
A064627 Positive integers not in A064494. 4
2, 3, 5, 7, 10, 11, 13, 17, 19, 21, 23, 25, 27, 29, 30, 31, 37, 41, 42, 43, 45, 47, 50, 53, 54, 59, 61, 63, 65, 66, 67, 69, 71, 73, 74, 78, 79, 83, 85, 86, 89, 93, 97, 99, 101, 103, 105, 107, 109, 110, 112, 113, 115, 117, 119, 123, 126, 127, 129, 131, 135, 137, 138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..63.

PROG

(Sagemath)

def divsign(s, k):

    if not k.divides(s): return 0

    return (-1)^(s//k)*k

def A(n):

    s = n + 1

    for k in srange(n, 1, -1):

        s -= divsign(s, k)

    return s

# Use with caution: search range must be adjusted as necessary!

def A064627List(size):

    return sorted(Set([A(n) for n in (1..3*size)]))[0:size]

print(A064627List(63)) # Peter Luschny, Sep 16 2019

CROSSREFS

Cf. A064494.

Sequence in context: A338174 A058590 A187711 * A324813 A235050 A117286

Adjacent sequences:  A064624 A064625 A064626 * A064628 A064629 A064630

KEYWORD

nonn

AUTHOR

Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Oct 16 2001

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 July 24 20:26 EDT 2021. Contains 346273 sequences. (Running on oeis4.)