A189387 a(n) = n+[nr/s]+[nt/s]; r=1, s=sqrt(2), t=1/sqrt(3).

1, 3, 6, 7, 10, 12, 13, 16, 18, 21, 22, 24, 27, 28, 31, 33, 35, 37, 39, 42, 43, 45, 48, 49, 52, 54, 57, 58, 60, 63, 64, 67, 69, 71, 73, 75, 78, 79, 81, 84, 85, 88, 90, 92, 94, 96, 99, 100, 103, 105, 107, 109, 111, 114, 115, 117, 120, 122, 124, 126, 128, 130, 132, 135, 136, 138, 141, 143, 145, 147, 149, 151, 153, 156, 158, 160, 162, 164, 166, 168, 171, 172, 174, 177

Offset: 1

Author

Clark Kimberling, Apr 21 2011

Keywords

• nonn

Comments

See A189386.

Links

• G. C. Greubel, Table of n, a(n) for n = 1..5000

Crossrefs

Cf. A189386, A189388, A189361, A189383, A189395.

Programs

Mathematica

r=1; s=2^(1/2); t=3^(-1/2);
a[n_] := n + Floor[n*s/r] + Floor[n*t/r];
b[n_] := n + Floor[n*r/s] + Floor[n*t/s];
c[n_] := n + Floor[n*r/t] + Floor[n*s/t]
Table[a[n], {n, 1, 120}]  (*A189386*)
Table[b[n], {n, 1, 120}]  (*A189387*)
Table[c[n], {n, 1, 120}]  (*A189388*)