A070758 Values of floor((3/2)^n) that are composite.

25, 38, 57, 86, 129, 194, 291, 437, 656, 985, 1477, 2216, 3325, 11222, 16834, 25251, 37876, 56815, 85222, 127834, 191751, 287626, 431439, 647159, 970739, 1456109, 2184164, 3276246, 4914369, 7371554, 11057332, 16585998, 24878997, 37318496

Offset: 1

Author

Eric W. Weisstein, May 04 2002

Keywords

• nonn

References

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

Links

• Robert Israel, Table of n, a(n) for n = 1..5649
• Eric Weisstein's World of Mathematics, Power Floors

Crossrefs

Cf. A070759, A067904.

Composites in A002379.

Programs

Maple

remove(isprime, [seq(floor((3/2)^n),n=2..100)]); # Robert Israel, Oct 30 2019

Mathematica

Select[Floor[(3/2)^Range[50]],CompositeQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 11 2017 *)