login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A188915 Union of squares and powers of 2. 5
0, 1, 2, 4, 8, 9, 16, 25, 32, 36, 49, 64, 81, 100, 121, 128, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 512, 529, 576, 625, 676, 729, 784, 841, 900, 961, 1024, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2048, 2116, 2209, 2304, 2401, 2500, 2601, 2704, 2809, 2916 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Union of A000290 and A000079;

A188916 and A188917 give positions where squares and powers of 2 occur:

n^2: a(A188916(n)) = A000290(n);

2^n: a(A188917(n)) = A000079(n);

4^n: a(A006127(n)) = A000302(n), A006127 is the intersection of A188916 and A188917.

A010052(a(n)) + A209229(a(n)) > 0. - Reinhard Zumkeller, May 19 2015

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

PROG

(Haskell)

import Data.List.Ordered (union)

a188915 n = a188915_list !! n

a188915_list = union a000290_list a000079_list

Reinhard Zumkeller, May 19 2015, Apr 14 2011

CROSSREFS

Cf. A000290, A000079, A010052, A209229, A006127, A188916, A188917.

Sequence in context: A049439 A251642 A079931 * A055008 A204826 A241010

Adjacent sequences:  A188912 A188913 A188914 * A188916 A188917 A188918

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Apr 14 2011

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 25 08:12 EST 2018. Contains 299646 sequences. (Running on oeis4.)