A048774 Numerators of coefficients in a formula for the n-th composite number.

1, 1, 2, 4, 19, 181

Offset

0,3

Comments

Denominators are 1,1,1,1,2,6,...

References

A. E. Bojarincev, Asymptotic expressions for the n-th composite number, Univ. Mat. Zap. 6:21-43 (1967). - In Russian.

D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, Section VII.20.

Links

Table of n, a(n) for n=0..5.

J.-P. Massias and G. Robin, Bornes effectives pour certaines fonctions concernant les nombres premiers, J. Théor. Nombres Bordeaux, 8 (1996), pp. 215-242.

Laurentiu Panaitopol, Some properties of the series of composed [sic] numbers, Journal of Inequalities in Pure and Applied Mathematics 2:3 (2001).

Crossrefs

Sequence in context: A058130 A191563 A046082 * A061213 A063458 A332991

Adjacent sequences: A048771 A048772 A048773 * A048775 A048776 A048777

Keyword

nonn,frac,nice,more

Author

N. J. A. Sloane

Status

approved