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A332924 6*a(n) are the perimeters of distinct triangles with integer sides i <= j <= k, whose area equals 4 times their perimeter. Terms occurring more than once belong to different triangles. 0
14, 15, 16, 18, 19, 20, 22, 24, 26, 28, 28, 30, 35, 35, 35, 40, 44, 49, 50, 51, 54, 66, 70, 81, 86, 87, 91, 97, 105, 114, 119, 119, 135, 154, 185, 187, 204, 219, 275, 322, 385, 390, 391, 737, 1430 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There are 45 integer-sided triangles with 4*area = perimeter, with terms 28 and 119 corresponding to pairs, and terms 35 to a triple of such triangles with different sides.

LINKS

Table of n, a(n) for n=1..45.

CROSSREFS

The 41 terms of A289220, divided by 24, are all terms of this sequence, but omitting distinct triangles with identical perimeters.

Sequence in context: A297278 A296748 A270042 * A048125 A163482 A257782

Adjacent sequences:  A332921 A332922 A332923 * A332925 A332926 A332927

KEYWORD

nonn,fini,full

AUTHOR

Hugo Pfoertner, Mar 02 2020

STATUS

approved

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Last modified October 26 22:06 EDT 2021. Contains 348269 sequences. (Running on oeis4.)