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In the following triangle the n-th row contains n numbers relatively prime to n and not occurring in a previous row. a(1) = 1. Sequence contains the triangle by rows.

7

`%I #9 Jun 05 2015 05:22:56
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`%S 1,3,5,2,4,7,9,11,13,15,6,8,12,14,16,17,19,23,25,29,31,10,18,20,22,24,
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`%T 26,27,21,33,35,37,39,41,43,45,28,32,34,38,40,44,46,47,49,51,53,57,59,
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`%U 61,63,67,69,71,73,30,36,42,48,50,52,54,56,58,60,62,55,65,77,79,83,85
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`%N In the following triangle the n-th row contains n numbers relatively prime to n and not occurring in a previous row. a(1) = 1. Sequence contains the triangle by rows.
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`%H Paul Tek, <a href="/A081964/b081964.txt">Table of n, a(n) for n = 1..10000</a>
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`%H Paul Tek, <a href="/A081964/a081964.pl.txt">Perl program for this sequence</a>
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`%e Triangle begins:
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`%e 1
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`%e 3 5
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`%e 2 4 7
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`%e 9 11 13 15
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`%e 6 8 12 14 16
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`%e ...
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`%o (Perl) See Link section.
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`%Y Cf. A081965, A081966.
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`%Y Cf. A095167 (noncoprime instead of coprime).
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`%K nonn,tabl
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`%O 1,2
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`%A _Amarnath Murthy_, Apr 03 2003
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`%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 08 2003
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