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A130451 Number of divisors of A123193(n). 2
1, 2, 2, 3, 2, 2, 3, 2, 2, 5, 2, 2, 2, 8, 3, 2, 8, 2, 2, 8, 2, 8, 2, 2, 3, 2, 8, 8, 2, 2, 8, 2, 8, 2, 2, 8, 2, 5, 2, 8, 2, 2, 2, 8, 2, 8, 8, 2, 2, 8, 2, 8, 3, 2, 8, 8, 2, 8, 8, 2, 8, 2, 2, 2, 8, 8, 2, 2, 8, 2, 3, 8, 2, 8, 2, 2, 8, 8, 8, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..80.

FORMULA

a(n)=A000005(A123193(n)). - R. J. Mathar, Nov 16 2007

MAPLE

isFib := proc(n) local i ; for i from 1 do if combinat[fibonacci](i) > n then RETURN(false) ; elif combinat[fibonacci](i) = n then RETURN(true) ; fi ; od: end: A123193 := proc(n) option remember ; local nmin, k ; nmin := 1 : if n > 1 then nmin := A123193(n-1)+1 ; fi ; for k from nmin do if isFib( numtheory[tau](k) ) then RETURN(k) ; fi ; od: end: A130451 := proc(n) numtheory[tau](A123193(n)) ; end: seq(A130451(n), n=1..80) ; # R. J. Mathar, Nov 16 2007

CROSSREFS

Sequence in context: A218800 A062502 A141242 * A130285 A046027 A283671

Adjacent sequences:  A130448 A130449 A130450 * A130452 A130453 A130454

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Aug 08 2007

EXTENSIONS

Corrected and extended by R. J. Mathar, Nov 16 2007

STATUS

approved

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Last modified October 22 22:35 EDT 2021. Contains 348180 sequences. (Running on oeis4.)