The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A332927 6*a(n) are the perimeters of distinct triangles with integer sides i <= j <= k, whose area equals 7 times their perimeter. Terms occurring more than once belong to different triangles. 1

%I #6 Mar 02 2020 18:54:16

%S 27,28,32,33,35,38,40,42,44,44,45,48,49,52,55,57,60,62,68,70,72,80,88,

%T 90,90,92,96,101,104,108,115,126,132,136,143,145,148,149,155,158,160,

%U 161,171,176,185,192,205,205,235,236,262,270,295,304,340,348,365,396,410,477,500,535,550,600,721,750,884,900,938,957,1023,1055,1287,1700,1972,2277,3333,3350,6567,13002

%N 6*a(n) are the perimeters of distinct triangles with integer sides i <= j <= k, whose area equals 7 times their perimeter. Terms occurring more than once belong to different triangles.

%C There are 80 integer-sided triangles with 7*area = perimeter, with terms 44, 90, and 205 corresponding to pairs of such triangles with different sides.

%Y The 77 terms of A289253, divided by 42, are all terms of this sequence, but omitting distinct triangles with identical perimeters.

%K nonn,fini,full

%O 1,1

%A _Hugo Pfoertner_, Mar 02 2020

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 19 14:17 EDT 2024. Contains 372697 sequences. (Running on oeis4.)