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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A269860 Numbers n such that n and A048673(n) are of the same parity. 3
1, 2, 3, 6, 8, 9, 11, 13, 18, 20, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 35, 37, 39, 46, 47, 49, 50, 54, 59, 60, 62, 66, 68, 69, 70, 71, 72, 74, 75, 76, 78, 80, 81, 83, 84, 85, 88, 89, 93, 94, 95, 96, 97, 98, 99, 104, 105, 107, 109, 111, 112, 116, 117, 118, 119, 121, 128, 131, 133, 138, 139, 141, 142, 143, 145, 147, 150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Union of odd terms of A246261 and even terms of A246263.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

MATHEMATICA

f[n_] := (Times @@ Power[If[# == 1, 1, NextPrime@ #] & /@ First@ #, Last@ #] + 1)/2 &@ Transpose@ FactorInteger@ n; Select[Range@ 150, Xor[EvenQ@ f@ #, OddQ@ #] &] (* Michael De Vlieger, Mar 17 2016 *)

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A269860 (ZERO-POS 1 1 (lambda (n) (- (A000035 n) (A000035 (A048673 n))))))

CROSSREFS

Complement: A269861.

Cf. A048674 (a subsequence).

Cf. A000035, A048673, A246261, A246263.

Cf. also A270430.

Sequence in context: A202341 A013948 A187478 * A013952 A105042 A092114

Adjacent sequences:  A269857 A269858 A269859 * A269861 A269862 A269863

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 16 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 16 10:52 EST 2021. Contains 340206 sequences. (Running on oeis4.)