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Search: id:A071977
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| A071977 |
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Triangle in which first row is {1}; to get n-th row take first n numbers greater than last number in previous row which are relatively prime to n. |
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+0
4
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| 1, 3, 5, 7, 8, 10, 11, 13, 15, 17, 18, 19, 21, 22, 23, 25, 29, 31, 35, 37, 41, 43, 44, 45, 46, 47, 48, 50, 51, 53, 55, 57, 59, 61, 63, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 81, 83, 87, 89, 91, 93, 97, 99, 101, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115
(list; table; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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Triangle begins 1; 3 5; 7 8 10; 11 13 15 17; 18 19 21 22 23; 25 29 31 35 37 41; ....
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MATHEMATICA
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a = {1}; k = 2; Do[i = 1; While[i < n + 1, If[ GCD[k, n] == 1, a = Append[a, k]; i++ ]; k++ ], {n, 2, 12}]; a
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CROSSREFS
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Diagonals give A071978, A071979.
Adjacent sequences: A071974 A071975 A071976 this_sequence A071978 A071979 A071980
Sequence in context: A120212 A093670 A049068 this_sequence A109404 A083034 A047392
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KEYWORD
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nonn,tabl
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 18 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 28 2002
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