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 A071979 Left diagonal of A071977. 2
 1, 3, 7, 11, 18, 25, 43, 51, 67, 81, 104, 119, 152, 167, 199, 227, 258, 277, 330, 351, 400, 437, 484, 509, 578, 609, 667, 709, 772, 803, 914, 947, 1010, 1065, 1136, 1187, 1292, 1331, 1411, 1477, 1574, 1619, 1764, 1809, 1906, 1989, 2084, 2135, 2276, 2333 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS MATHEMATICA a = {1}; k = 2; Do[i = 1; While[i < n + 1, If[ GCD[k, n] == 1, a = Append[a, k]; i++ ]; k++ ], {n, 2, 55}]; Table[ a[[n(n - 1)/2 + 1]], {n, 1, 55}] CROSSREFS Sequence in context: A049792 A062851 A178464 * A335323 A097748 A255000 Adjacent sequences:  A071976 A071977 A071978 * A071980 A071981 A071982 KEYWORD nonn AUTHOR Amarnath Murthy, Jun 18 2002 EXTENSIONS Edited by Robert G. Wilson v, Jun 28 2002 STATUS approved

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Last modified September 24 12:08 EDT 2021. Contains 347642 sequences. (Running on oeis4.)