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!)
A331254 Triangles with integer sides i <= j <= k sorted by radius of circumcircle, and, in case of ties, lexicographically by side lengths (smallest first). The sequence gives the shortest side i. The other sides are in A331255 and A331256. 5
1, 1, 2, 2, 1, 2, 3, 3, 1, 2, 2, 3, 4, 3, 1, 2, 4, 3, 2, 3, 4, 5, 3, 1, 4, 4, 2, 3, 5, 4, 2, 5, 3, 6, 5, 4, 1, 3, 2, 4, 5, 3, 4, 6, 5, 2, 6, 4, 5, 1, 6, 2, 3, 3, 5, 7, 3, 4, 4, 4, 6, 5, 5, 7, 6, 2, 7, 4, 6, 1, 5, 5, 2, 6, 3, 3, 7, 6, 4, 8, 5, 4, 7, 3, 5, 6, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..87.

EXAMPLE

List of triangles begins:

   n

   |     R^2 = A331227(n)/A331228(n)

   |     |    i .... (this sequence)

   |     |    | j .. (A331255)

   |     |    | | k  (A331256)

   |     |    | | |

   1    1/ 3  1 1 1

   2   16/15  1 2 2

   3    4/ 3  2 2 2

   4   16/ 7  2 2 3

   5   81/35  1 3 3

   6   81/32  2 3 3

   7    3/ 1  3 3 3

   8   81/20  3 3 4

   9  256/63  1 4 4

  10   64/15  2 3 4

  11   64/15  2 4 4

  12  256/55  3 4 4

CROSSREFS

Cf. A331227, A331228, A331251, A331252, A331253.

Cf. A331255 (middle side), A331256 (longest side).

Sequence in context: A241424 A334671 A294232 * A193738 A230494 A106580

Adjacent sequences:  A331251 A331252 A331253 * A331255 A331256 A331257

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Jan 19 2020

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 October 21 00:18 EDT 2021. Contains 348119 sequences. (Running on oeis4.)