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A229040 Fibonacci numbers in which parity of the decimal digits alternates. 0
0, 1, 2, 3, 5, 8, 21, 34, 89, 610, 987, 4181, 6765 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

No more values through F(12000).

LINKS

Table of n, a(n) for n=1..13.

FORMULA

A000045 INTERSECTION A030141.

MAPLE

isA030141 := proc(n)

    dgs := convert(n, base, 10) ;

    for i from 2 to nops(dgs) do

        if modp(op(i, dgs), 2) = modp(op(i-1, dgs), 2) then

            return false;

        end if;

    end do:

    true ;

end proc:

for i from 0 do

    f := combinat[fibonacci](i) ;

    if isA030141(f) then

        print(f) ;

    end if;

end do: # R. J. Mathar, Mar 13 2015

CROSSREFS

Cf. A000045, A030141, A030152, A030144.

Sequence in context: A002363 A041457 A161468 * A143873 A273046 A117774

Adjacent sequences:  A229037 A229038 A229039 * A229041 A229042 A229043

KEYWORD

nonn,base

AUTHOR

Jonathan Vos Post, Sep 12 2013

STATUS

approved

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Last modified October 18 20:10 EDT 2018. Contains 316325 sequences. (Running on oeis4.)