The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A336750 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A336750

Triples for integer-sided triangles whose sides a < b < c are in arithmetic progression.
(history; published version)

#46 by N. J. A. Sloane at Fri May 06 13:13:51 EDT 2022

CROSSREFS

Cf. A103605 (similar , with Pythagorean triples).

Cf. A335893 (similar , with A, B, C in arithmetic progression).

Discussion

Fri May 06

13:13

OEIS Server: https://oeis.org/edit/global/2941

#45 by Peter Luschny at Mon Oct 19 11:13:08 EDT 2020

STATUS

reviewed

approved

#44 by Michel Marcus at Sat Oct 17 03:37:27 EDT 2020

STATUS

proposed

reviewed

#43 by Michael De Vlieger at Thu Oct 15 17:18:16 EDT 2020

STATUS

editing

proposed

Discussion

Fri Oct 16

01:49

Bernard Schott: Merci for Mathematica.

#42 by Michael De Vlieger at Thu Oct 15 17:18:14 EDT 2020

MATHEMATICA

Block[{nn = 12, a, b, c}, Reap[Do[Do[Sow@ {a, b, 2 b - a}, {a, b - Floor[(b - 1)/2], b - 1}], {b, 3, nn}]][[-1, 1]] ] // Flatten (* Michael De Vlieger, Oct 15 2020 *)

STATUS

proposed

editing

#41 by Michel Marcus at Thu Oct 15 14:36:01 EDT 2020

STATUS

editing

proposed

Discussion

Thu Oct 15

15:09

Bernard Schott: Yes, thanks, better.

#40 by Michel Marcus at Thu Oct 15 14:35:10 EDT 2020

FORMULA

T(n,1) = A336751(n); T(n,2) = A307136(n); T(n,3) = A336753(n).

T(n,2) = A307136(n);

T(n,3) = A336753(n);

STATUS

proposed

editing

Discussion

Thu Oct 15

14:36

Michel Marcus: so that formula line looks like the 3-column array

#39 by Bernard Schott at Thu Oct 15 10:03:28 EDT 2020

STATUS

editing

proposed

#38 by Bernard Schott at Thu Oct 15 10:02:23 EDT 2020

FORMULA

aT(n, 1) = A336751(n);

aT(n, 2) = A307136(n);

aT(n, 3) = A336753(n);

A336754(n) = aT(n, 1) + aT(n, 2) + aT(n, 3).

STATUS

proposed

editing

Discussion

Thu Oct 15

10:03

Bernard Schott: Ok, modified, merci.

#37 by Bernard Schott at Thu Oct 15 09:55:58 EDT 2020

STATUS

editing

proposed

Discussion

Thu Oct 15

09:58

Michel Marcus: please use T(n,k) rather than a(n, k)