The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A075412

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A075412

Squares of A002277.
(history; published version)

#30 by Harvey P. Dale at Sun Feb 12 16:00:24 EST 2023

STATUS

editing

approved

#29 by Harvey P. Dale at Sun Feb 12 16:00:21 EST 2023

MATHEMATICA

Table[FromDigits[PadRight[{}, n, 9]]FromDigits[PadRight[{}, n, 1]], {n, 0, 15}] (* Harvey P. Dale, Feb 12 2023 *)

STATUS

approved

editing

#28 by Susanna Cuyler at Mon Nov 11 09:22:37 EST 2019

STATUS

proposed

approved

#27 by Michel Marcus at Mon Nov 11 04:28:38 EST 2019

STATUS

editing

proposed

#26 by Michel Marcus at Mon Nov 11 04:28:31 EST 2019

COMMENTS

a(n) = A002283(n)*A002275(n). [From Reinhard Zumkeller, May 31 2010]

LINKS

G. Villemin, <a href="http://persovillemin.gerard.wanadoofree.fr/yoda.guillaumeWwwgvmm/Addition/P100a500/Carrerep.htm">Variations sur les carrescarrés</a>

FORMULA

a(n) = A002283(n)*A002275(n). [Reinhard Zumkeller, May 31 2010]

STATUS

approved

editing

#25 by Wesley Ivan Hurt at Sat Apr 02 21:24:23 EDT 2016

STATUS

proposed

approved

#24 by José de Jesús Camacho Medina at Sat Apr 02 18:39:16 EDT 2016

STATUS

editing

proposed

#23 by José de Jesús Camacho Medina at Sat Apr 02 18:39:12 EDT 2016

FORMULA

a(n) = (10^(n+1)-10)^2/900. - José de Jesús Camacho Medina, Apr 01 2016

#22 by Joerg Arndt at Sat Apr 02 02:21:10 EDT 2016

STATUS

proposed

editing

#21 by José de Jesús Camacho Medina at Fri Apr 01 19:04:49 EDT 2016

STATUS

editing

proposed

Discussion

Sat Apr 02

01:51

Michel Marcus: For n=1 your formula gives 0, but here a(1)=9 (see bfile). I think you want a(n) = (10^(n+1)-10)^2/900