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 A316841 Three-column table read by rows giving integer sides of proper triangles (i,j,k) with i >= j >= k >= 1, j+k > i. 18
 1, 1, 1, 2, 2, 1, 2, 2, 2, 3, 2, 2, 3, 3, 1, 3, 3, 2, 3, 3, 3, 4, 3, 2, 4, 3, 3, 4, 4, 1, 4, 4, 2, 4, 4, 3, 4, 4, 4, 5, 3, 3, 5, 4, 2, 5, 4, 3, 5, 4, 4, 5, 5, 1, 5, 5, 2, 5, 5, 3, 5, 5, 4, 5, 5, 5, 6, 4, 3, 6, 4, 4, 6, 5, 2, 6, 5, 3, 6, 5, 4, 6, 5, 5, 6, 6, 1, 6, 6, 2, 6, 6, 3, 6, 6, 4, 6, 6, 5, 6, 6, 6, 7, 4, 4, 7, 5, 3, 7, 5, 4, 7, 5, 5, 7, 6, 2, 7, 6, 3, 7, 6, 4, 7, 6, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Lars Blomberg, Table of n, a(n) for n = 1..9000 EXAMPLE Table begins (imprimitive triples are labeled i): [1,1,1], [2,2,1], [2,2,2],i [3,2,2], [3,3,1], [3,3,2], [3,3,3],i [4,3,2], [4,3,3], [4,4,1], [4,4,2],i [4,4,3], [4,4,4],i [5,3,3], ... PROG (PARI) for(i=1, 6, for(j=1, i, for(k=1, j, if(j+k>i, print1(i, ", ", j, ", ", k, ", "))))) \\ Hugo Pfoertner, Jan 25 2020 CROSSREFS There are A002620(k+1) rows that begin with k. The three columns are A316843, A316844, A316845. A316849 is a compressed version. See A316842 for primitive triples. See A316851 and A316853 & A317182 for perimeter and area. Other related sequences: A051493, A070080, A070081, A070082, A070110. Sequence in context: A029350 A166597 A302490 * A000003 A234398 A168208 Adjacent sequences:  A316838 A316839 A316840 * A316842 A316843 A316844 KEYWORD nonn,look,tabf AUTHOR N. J. A. Sloane, Jul 23 2018, following a suggestion from Donald S. McDonald. STATUS approved

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Last modified August 14 01:29 EDT 2020. Contains 336473 sequences. (Running on oeis4.)