A152976 - OEIS

A152976

Denominators of the redundant Stern-Brocot structure; numerators=A152975.

1, 2, 3, 1, 3, 6, 3, 5, 2, 3, 1, 4, 9, 5, 10, 5, 9, 4, 7, 3, 6, 3, 5, 2, 3, 1, 5, 12, 7, 15, 8, 15, 7, 14, 7, 15, 8, 15, 7, 12, 5, 9, 4, 9, 5, 10, 5, 9, 4, 7, 3, 6, 3, 5, 2, 3, 1, 6, 15, 9, 20, 11, 21, 10, 21, 11, 24, 13, 25, 12, 21, 9, 18, 9, 21, 12, 25, 13, 24, 11, 21, 10, 21, 11, 20, 9, 15, 6

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OFFSET

1,2

COMMENTS

a(2^n-n+2*k) = A047679(2^(n-1)+k) for 0<=k<2^(n-1);

a(2^n-n+2*k-1) = A047679(2^(n-1)+k-1) + A047679(2^(n-1)+k) for 0<k<2^(n-1);

A060188(k+2) = Sum(a(i): 2^k <= i < 2^(k+1)).

REFERENCES

Milad Niqui, Formalising Exact Arithmetic, Ph.D. thesis, Radboud Universiteit Nijmegen, IPA Dissertation Series 2004-10, 2.6, p.65f .

LINKS

Table of n, a(n) for n=1..88.

Milad Niqui, Formalising Exact Arithmetic