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 A039953 Triangle of "canonical" optimal Golomb rulers. 3
 1, 1, 2, 1, 3, 2, 1, 3, 5, 2, 1, 3, 6, 2, 5, 1, 3, 6, 8, 5, 2, 1, 3, 5, 6, 7, 10, 2, 1, 4, 7, 13, 2, 8, 6, 3, 1, 5, 4, 13, 3, 8, 7, 12, 2, 1, 3, 9, 15, 5, 14, 7, 10, 6, 2, 2, 4, 18, 5, 11, 3, 12, 13, 7, 1, 9, 2, 3, 20, 12, 6, 16, 11, 15, 4, 9, 1, 7 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS n-th row gives first differences of the (n+1)-th row of A106683. - Andrey Zabolotskiy, Aug 22 2017 REFERENCES CRC Handbook of Combinatorial Designs, 1996, p. 315. A. Kotzig and P. J. Laufer, Sum triangles of natural numbers having minimum top, Ars. Combin. 21 (1986), 5-13. LINKS Distributed.Net, Project OGR L. Miller, Golomb Rulers B. Rankin, Golomb Ruler Calculations J. B. Shearer, Golomb ruler table N. J. A. Sloane, First few optimal Golomb rulers Eric Weisstein's World of Mathematics, Golomb Ruler Wikipedia, Golomb ruler EXAMPLE 1; 1 2; 1 3 2; 1 3 5 2; 1 3 6 2 5; 1 3 6 8 5 2; ... CROSSREFS Cf. A003022, A036501. These all start at 1. For rulers starting at 0, see A079283, A079287, A079423, A079425, A079426, A079430, A079433, A079434, A079435, A079454 and Sequence in context: A002973 A071476 A071499 * A169742 A257077 A086414 Adjacent sequences:  A039950 A039951 A039952 * A039954 A039955 A039956 KEYWORD nonn,tabl,nice AUTHOR EXTENSIONS Corrected by Philip Newton, Feb 06 2002 Corrected by Andrey Zabolotskiy, Aug 22 2017 STATUS approved

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Last modified July 23 15:58 EDT 2019. Contains 325258 sequences. (Running on oeis4.)