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Search: id:A048486
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| A048486 |
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Values of n for which the position of central and maximal values of A001221[ C[ n,k ] ] coincide. |
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4
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| 1, 2, 3, 4, 5, 8, 12, 13, 16, 17, 40, 41, 64, 65, 107, 108, 132, 133, 219, 220, 288, 340, 341, 400, 401, 419, 420, 421
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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x is in the sequence if Floor[ x/2 ] is not only central but also the place of maximum for the number of distinct prime factors of C[ n,k ] binomial coefficients.
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EXAMPLE
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If n=16 and k=0,...,16 then r=0,1,3,3,4,4,4,4,5,4,4,4,4,3,3,1,0. The maximum of A001221[ C[ 16,k ] ] values, i.e. 5 is appears at k=8, the center. Thus 16 is in this sequence.
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CROSSREFS
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Cf. A001221, A001405, A048273, A034973, A048571.
Sequence in context: A101137 A053021 A122700 this_sequence A065428 A059747 A094087
Adjacent sequences: A048483 A048484 A048485 this_sequence A048487 A048488 A048489
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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