The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A230842 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A230842

Values of y such that x^2 + y^2 = 61^n with x and y coprime and 0 < x < y.
(history; published version)

#9 by T. D. Noe at Mon Nov 04 13:48:04 EST 2013

STATUS

editing

approved

#8 by T. D. Noe at Mon Nov 04 13:47:53 EST 2013

MATHEMATICA

Table[Select[PowersRepresentations[61^n, 2, 2], CoprimeQ[#[[1]], #[[2]]] &][[1, 2]], {n, 21}] (* T. D. Noe, Nov 04 2013 *)

STATUS

approved

editing

#7 by Joerg Arndt at Fri Nov 01 14:08:27 EDT 2013

STATUS

reviewed

approved

#6 by Joerg Arndt at Fri Nov 01 13:25:03 EDT 2013

STATUS

proposed

reviewed

#5 by Colin Barker at Thu Oct 31 10:39:51 EDT 2013

STATUS

editing

proposed

#4 by Colin Barker at Thu Oct 31 10:38:59 EDT 2013

CROSSREFS

Cf. A188948, A230622, A230644, A230710, A230712, A230743, A188949, A230623, A230645, A230711, A230713, A230744, A230760.

STATUS

proposed

editing

#3 by Colin Barker at Thu Oct 31 06:42:29 EDT 2013

STATUS

editing

proposed

#2 by Colin Barker at Thu Oct 31 06:41:54 EDT 2013

NAME

allocated for Colin BarkerValues of y such that x^2 + y^2 = 61^n with x and y coprime and 0 < x < y.

DATA

6, 60, 415, 3479, 27474, 194220, 1752665, 10361041, 108089046, 665045051, 6449019055, 45629658360, 371682946434, 3000926368429, 20605153668425, 190323205453920, 1089586196530086, 11672337637546091, 73603293662217846, 692487869011494600, 5011061854350480605

OFFSET

1,1

COMMENTS

The corresponding x-values are in A230841.

EXAMPLE

a(3)=415 because 234^2+415^2=226981=61^3.

CROSSREFS

Cf. A230841.

Cf. A188948, A230622, A230644, A230710, A230712, A230743, A230760.

KEYWORD

allocated

nonn

AUTHOR

Colin Barker, Oct 31 2013

STATUS

approved

editing

#1 by Colin Barker at Thu Oct 31 06:34:41 EDT 2013

NAME

allocated for Colin Barker

KEYWORD

allocated

STATUS

approved