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!)
A235720 Squares which have one or more occurrences of exactly five different digits. 3
12769, 13456, 13689, 13924, 15376, 15876, 16384, 17689, 17956, 18496, 18769, 20164, 20736, 21609, 21904, 23104, 23409, 23716, 28561, 29584, 30276, 30625, 30976, 31684, 32041, 32761, 34596, 35721, 36481, 37249, 38025, 38416, 39204, 39601, 41209, 43681, 45369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The first term having a repeated digit is 100489.

LINKS

Colin Barker, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = A054033(n)^2.

EXAMPLE

30976 is in the sequence because 30976 = 176^2 and 30976 contains exactly five different digits: 0, 3, 6, 7 and 9.

PROG

(PARI) s=[]; for(n=1, 1200, if(#vecsort(eval(Vec(Str(n^2))), , 8)==5, s=concat(s, n^2))); s

CROSSREFS

Cf. A235717-A235719, A235721-A235724, A225218.

Sequence in context: A207581 A207056 A210105 * A187600 A187597 A203273

Adjacent sequences:  A235717 A235718 A235719 * A235721 A235722 A235723

KEYWORD

nonn,base

AUTHOR

Colin Barker, Jan 15 2014

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 June 12 19:05 EDT 2021. Contains 344959 sequences. (Running on oeis4.)