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 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
 27, 28, 32, 33, 35, 38, 40, 42, 44, 44, 45, 48, 49, 52, 55, 57, 60, 62, 68, 70, 72, 80, 88, 90, 90, 92, 96, 101, 104, 108, 115, 126, 132, 136, 143, 145, 148, 149, 155, 158, 160, 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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. LINKS Table of n, a(n) for n=1..80. CROSSREFS The 77 terms of A289253, divided by 42, are all terms of this sequence, but omitting distinct triangles with identical perimeters. Sequence in context: A031957 A350769 A258267 * A031171 A106126 A069551 Adjacent sequences: A332924 A332925 A332926 * A332928 A332929 A332930 KEYWORD nonn,fini,full AUTHOR Hugo Pfoertner, Mar 02 2020 STATUS approved

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Last modified September 25 02:38 EDT 2023. Contains 365582 sequences. (Running on oeis4.)