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 A084759 Composite numbers in ascending order such that difference of successive terms is unique. a(m)-a(m-1) = a(k)-a(k-1) iff m = k. 2
 4, 6, 9, 10, 14, 20, 25, 32, 40, 49, 60, 70, 82, 95, 110, 124, 140, 158, 175, 194, 214, 235, 258, 280, 304, 329, 355, 382, 410, 440, 469, 500, 532, 565, 600, 634, 670, 707, 745, 784, 824, 865, 908, 950, 994, 1040, 1085, 1132, 1180, 1230, 1281, 1330, 1382, 1435 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence of successive difference is 2,3,1,4,6,5,7,8,9,11,10,12,13,15,14,16,18,17,19,20,21,23,22,24,25,26,27,28,... Conjecture: every number is a term of this sequence. For every number r there exists some k such that a(k) - a(k-1)= r. LINKS EXAMPLE After 14 it is 20 and not 18 or 16 as 6-4 = 16-14 = 2, 18-14 = 14-10 = 4. CROSSREFS Cf. A084758. Sequence in context: A078972 A115652 A193305 * A054395 A142863 A132435 Adjacent sequences:  A084756 A084757 A084758 * A084760 A084761 A084762 KEYWORD nonn AUTHOR Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), Jun 17 2003 EXTENSIONS More terms from David Wasserman, Jan 05 2005 STATUS approved

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