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A037811 Number of i such that d(i)<=d(i-1), where Sum{d(i)*4^i: i=0,1,...,m} is the base 4 representation of n. 2
0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 1, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,21

LINKS

Table of n, a(n) for n=1..90.

MAPLE

A037811 := proc(n)

    a := 0 ;

    dgs := convert(n, base, 4);

    for i from 2 to nops(dgs) do

        if op(i, dgs)<=op(i-1, dgs) then

            a := a+1 ;

        end if;

    end do:

    a ;

end proc: # R. J. Mathar, Oct 16 2015

CROSSREFS

Cf. A037827.

Sequence in context: A297828 A062245 A062246 * A091237 A143477 A214774

Adjacent sequences:  A037808 A037809 A037810 * A037812 A037813 A037814

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Sign in name corrected. - R. J. Mathar, Oct 16 2015

STATUS

approved

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Last modified October 18 15:41 EDT 2019. Contains 328162 sequences. (Running on oeis4.)