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 A145110 Number of elements in the Redheffer matrix that contribute to the Moebius function. 0
 1, 2, 3, 6, 5, 10, 7, 13, 11, 14 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(11) to a(30) are conjectured to be 11, 23, 13, 18, 19, 25, 17, 29, 19, 30, 26, 26, 23, 45, 27, 30, 32, 39, 29, 48. [From Mats Granvik, Dec 21 2008] LINKS Table of n, a(n) for n=1..10. EXAMPLE Contribution from Mats Granvik, 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) CROSSREFS Cf. A008683, A143104. Sequence in context: A319785 A080029 A091239 * A257405 A373545 A043547 Adjacent sequences: A145107 A145108 A145109 * A145111 A145112 A145113 KEYWORD more,nonn AUTHOR Mats Granvik, Oct 02 2008 EXTENSIONS a(9)-a(10) from Mats Granvik, Oct 05 2008 Moved conjectured terms a(11)-a(30) to Comments. - N. J. A. Sloane, May 22 2014 STATUS approved

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Last modified June 20 09:16 EDT 2024. Contains 373515 sequences. (Running on oeis4.)