A184813 n+[nr/s]+[nt/s], where r=sqrt(2), s=sqrt(3), t=sqrt(5), and []=floor.

2, 5, 8, 12, 15, 17, 21, 24, 27, 30, 33, 36, 39, 43, 46, 49, 51, 55, 58, 61, 65, 67, 70, 73, 77, 80, 83, 86, 89, 92, 96, 99, 101, 104, 108, 111, 114, 118, 120, 123, 126, 130, 133, 135, 139, 142, 145, 148, 152, 154, 157, 161, 164, 167, 170, 173, 176, 179, 183, 185, 188, 192, 195, 198

Offset: 1

Author

Clark Kimberling, Jan 22 2011

Keywords

• nonn

Comments

See A184812.

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A184812, A184814.

Programs

Mathematica

(See A184812.)

PARI

a(n) = n + floor(n*sqrt(2/3)) + floor(n*sqrt(5/3)); \\ Michel Marcus, Jul 01 2017