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A145110
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Number of elements in the Redheffer matrix that contribute to the Moebius function.
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0
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1, 2, 3, 6, 5, 10, 7, 13, 11, 14, 11, 23, 13, 18, 19, 25, 17, 29, 19, 30, 26, 26, 23, 45, 27, 30, 32, 39, 29, 48
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Then next term a(9) appears to be 11.
a(11) to a(30) are conjectured values. [From Mats Granvik (mats.granvik(AT)abo.fi), Dec 21 2008]
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EXAMPLE
| Contribution from Mats Granvik (mats.granvik(AT)abo.fi), Dec 21 2008: (Start)
The contributing elements for a(8) are:
0,0,0,0,0,0,0,1
1,1,0,0,0,0,0,0
0,0,1,0,0,0,0,0
1,1,0,1,0,0,0,0
0,0,0,0,1,0,0,0
0,0,0,0,0,1,0,0
0,0,0,0,0,0,1,0
1,1,0,1,0,0,0,0
where rows 8, 4 and 2 are included because they are divisors of 8. The sum of this array is 13, therefore a(8) = 13. (End)
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CROSSREFS
| Cf. A008683, A143104.
Sequence in context: A119790 A080029 A091239 * A043547 A064919 A064923
Adjacent sequences: A145107 A145108 A145109 * A145111 A145112 A145113
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KEYWORD
| more,nonn
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AUTHOR
| Mats Granvik (mats.granvik(AT)abo.fi), Oct 02 2008
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EXTENSIONS
| a(9)-a(10) from Mats Granvik (mats.granvik(AT)abo.fi), Oct 05 2008
Added terms a(11) to a(30). Mats Granvik (mats.granvik(AT)abo.fi), Dec 21 2008
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