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Search: id:A133995
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| A133995 |
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Irregular array read by rows: n-th row contains (in numerical order) the positive integers <= n which are neither the divisors of n nor are coprime to n. Row n is {0} if every positive integer <= n is either coprime to n or divides n. |
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2
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| 0, 0, 0, 0, 0, 4, 0, 6, 6, 4, 6, 8, 0, 8, 9, 10, 0, 4, 6, 8, 10, 12, 6, 9, 10, 12, 6, 10, 12, 14, 0, 4, 8, 10, 12, 14, 15, 16, 0, 6, 8, 12, 14, 15, 16, 18, 6, 9, 12, 14, 15, 18, 4, 6, 8, 10, 12, 14, 16, 18, 20, 0, 9, 10, 14, 15, 16, 18, 20, 21, 22, 10, 15, 20, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 6, 12, 15, 18, 21, 24
(list; table; graph; listen)
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OFFSET
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1,6
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COMMENT
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Row n contains A045763(n) terms.
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EXAMPLE
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The divisors of 12 are: 1,2,3,4,6,12. The positive integers which are <= 12 and are coprime to 12 are: 1,5,7,11. So row 12 contains the positive integers <= 12 which are in neither of these two lists: 8,9,10.
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CROSSREFS
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Cf. A133994, A045763.
Sequence in context: A075443 A021250 A073758 this_sequence A019629 A073759 A066760
Adjacent sequences: A133992 A133993 A133994 this_sequence A133996 A133997 A133998
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KEYWORD
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nonn,tabl
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Oct 01 2007
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EXTENSIONS
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More terms from Alvin H. Belt (AlvinBelt(AT)msn.com), Jan 21 2008
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