A119804 - OEIS

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A119804

a(0) = 0. For m >= 0 and 0 <= k <= 2^m -1, a(2^m +k) = number of earlier terms of the sequence which equal k.

0, 1, 1, 2, 1, 3, 1, 1, 1, 6, 1, 1, 0, 0, 1, 0, 4, 9, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 13, 14, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 21, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0

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OFFSET

0,4

LINKS

Table of n, a(n) for n=0..102.

EXAMPLE

8 = 2^3 + 0; so for a(8) we want the number of terms among terms a(1), a(2),... a(7) which equal 0. So a(8) = 1.

PROG

(PARI) A119804(mmax)= { local(a, ncopr); a=[0]; for(m=0, mmax, for(k=0, 2^m-1, ncopr=0; for(i=1, 2^m+k, if( a[i]==k, ncopr++; ); ); a=concat(a, ncopr); ); ); return(a); } { print(A119804(6)); } - R. J. Mathar, May 30 2006

CROSSREFS

Cf. A119805.

Sequence in context: A057021 A152443 A373368 * A300977 A144869 A247564

Adjacent sequences: A119801 A119802 A119803 * A119805 A119806 A119807

KEYWORD

easy,nonn

AUTHOR

Leroy Quet, May 24 2006

EXTENSIONS

More terms from R. J. Mathar, May 30 2006

STATUS

approved