A070761 - OEIS

A070761

Values of floor((4/3)^n) that are composite.

4, 9, 42, 56, 74, 99, 133, 177, 236, 315, 420, 560, 747, 996, 1328, 1771, 2362, 3149, 4199, 5599, 7466, 9954, 13273, 17697, 23596, 31462, 41950, 74577, 99437, 132583, 235703, 314271, 419028, 558704, 744938, 993251, 1324335, 1765780, 2354374

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OFFSET

1,1

REFERENCES

R. K. Guy, Unsolved Problems in Number Theory, E19

LINKS

Table of n, a(n) for n=1..39.

Eric Weisstein's World of Mathematics, Power Floors

MATHEMATICA

Select[Rest[Union[Floor[(4/3)^Range[80]]]], !PrimeQ[#]&] (* Harvey P. Dale, Sep 23 2011 *)

CROSSREFS

Cf. A046038, A067905, A070762.

Sequence in context: A053908 A149165 A083859 * A149166 A149167 A149168

Adjacent sequences: A070758 A070759 A070760 * A070762 A070763 A070764

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, May 04 2002

STATUS

approved