A182976 Denominators of fractions with the same position in A020652/A038567 and A182972/A182973.

2, 3, 5, 23, 73, 143, 163, 235, 477, 1238, 4175, 4641, 7820, 11217, 25915, 37643, 95299, 576088, 1203677

Offset

1,1

Comments

The positions of the matching fractions are given in A182974.

The numerators of the matching fractions are given in A182975.

The initial (zeroth) term of A038567 is ignored.

References

S. Cook, Problem 511: An Enumeration Problem, Journal of Recreational Mathematics, Vol. 9:2 (1976-77), 137. Solution by the Problem Editor, JRM, Vol. 10:2 (1977-78), 122-123.

Links

Table of n, a(n) for n=1..19.

Paul Yiu, Recreational Mathematics, 24.3.1 Appendix: Two enumerations of the rational numbers in (0,1), page 633.

Example

The matching fractions are 1/2, 1/3, 2/5, 9/23, 30/73, 59/143 ... (this is A182975/A182976).

Crossrefs

Cf. A020652, A038567, A182972-A182975.

Sequence in context: A171432 A214703 A327700 * A042363 A208220 A138655

Adjacent sequences: A182973 A182974 A182975 * A182977 A182978 A182979

Keyword

nonn,frac,more

Author

William Rex Marshall, Dec 16 2010

Status

approved