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A048485 a(n) = floor(n/2) - A048475(n). 3
0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 2, 2, 3, 3, 3, 0, 3, 1, 1, 0, 1, 1, 0, 0, 4, 3, 3, 3, 2, 1, 0, 0, 0, 0, 2, 2, 1, 1, 3, 0, 0, 0, 1, 1, 5, 3, 4, 4, 3, 5, 0, 0, 8, 1, 7, 8, 2, 11, 1, 4, 4, 10, 3, 6, 11, 7, 7, 6, 6, 5, 4, 4, 7, 3, 2, 2, 5, 1, 0, 0, 0, 3, 2, 2, 1, 1, 0, 0, 0, 1, 0, 0, 3, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,17

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..4000

EXAMPLE

If n=51 then the number of divisors of the central binomial coefficient binomial(51,25) is 4608, while the maximal number of divisors of binomial(51,k) is 6144, which appears first at k=24; thus the deviation a(51) = |25-24| = 1 is small.

MATHEMATICA

a[n_] := Block[{d = DivisorSigma[0, Binomial[n, Range[0, n/2]]]}, Floor[n/2] - Position[d, Max[d], 1, 1][[1, 1]] + 1]; Array[a, 100] (* Giovanni Resta, May 14 2018 *)

CROSSREFS

Cf. A000005, A001405, A034974, A048275.

Sequence in context: A084401 A236465 A131619 * A127714 A283763 A220604

Adjacent sequences:  A048482 A048483 A048484 * A048486 A048487 A048488

KEYWORD

nonn,look

AUTHOR

Labos Elemer

STATUS

approved

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Last modified May 20 01:04 EDT 2022. Contains 353847 sequences. (Running on oeis4.)