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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

Table of n, a(n) for n=1..50.

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.)