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Search: id:A077661
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| A077661 |
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Triangle read by rows in which the n-th row contains n smallest numbers not coprime to n; except first row = {1}. |
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+0
3
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| 1, 2, 4, 3, 6, 9, 2, 4, 6, 8, 5, 10, 15, 20, 25, 2, 3, 4, 6, 8, 9, 7, 14, 21, 28, 35, 42, 49, 2, 4, 6, 8, 10, 12, 14, 16, 3, 6, 9, 12, 15, 18, 21, 24, 27, 2, 4, 5, 6, 8, 10, 12, 14, 15, 16, 11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 121, 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 13, 26
(list; table; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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1; 2,4; 3,6,9; 2,4,6,8; 5,10,15,20,25; 2,3,4,6,8,9; 7,14,21,28,35,42,49; ...
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CROSSREFS
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Cf. A077662, A077663.
Sequence in context: A039874 A114107 A128556 this_sequence A139413 A077583 A153125
Adjacent sequences: A077658 A077659 A077660 this_sequence A077662 A077663 A077664
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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), Nov 14 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 27 2003
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