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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A062320 Nonsquarefree numbers squared. A013929(n)^2. 4
16, 64, 81, 144, 256, 324, 400, 576, 625, 729, 784, 1024, 1296, 1600, 1936, 2025, 2304, 2401, 2500, 2704, 2916, 3136, 3600, 3969, 4096, 4624, 5184, 5625, 5776, 6400, 6561, 7056, 7744, 8100, 8464, 9216, 9604, 9801, 10000, 10816, 11664, 12544, 13456 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

A008966(A037213(a(n))) = 0. - Reinhard Zumkeller, Sep 03 2015

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..1000

PROG

(PARI) for(n=1, 55, if(issquarefree(n), n+1, print(n^2)))

(PARI) n=-1; for (m=1, 10^9, if (!issquarefree(m), write("b062320.txt", n++, " ", m^2); if (n==1000, break))) \\ Harry J. Smith, Aug 04 2009

(PARI) is(n)=issquare(n, &n) && !issquarefree(n) \\ Charles R Greathouse IV, Sep 18 2015

(Haskell)

a062320 = (^ 2) . a013929 -- Reinhard Zumkeller, Sep 03 2015

CROSSREFS

Cf. A013929, A008966, A037213, A320965.

Squares in A046099.

Sequence in context: A118902 A092210 A320892 * A233330 A322449 A117453

Adjacent sequences:  A062317 A062318 A062319 * A062321 A062322 A062323

KEYWORD

easy,nonn

AUTHOR

Jason Earls, Jul 05 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Jul 11 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 December 13 03:41 EST 2019. Contains 329968 sequences. (Running on oeis4.)