A189381 - OEIS

A189381

a(n) = n + [n*r/s] + [n*t/s]; r=1, s=-1+sqrt(2), t=1+sqrt(2).

8, 17, 27, 36, 46, 54, 63, 73, 82, 92, 101, 109, 119, 128, 138, 147, 157, 165, 174, 184, 193, 203, 212, 220, 230, 239, 249, 258, 268, 276, 285, 295, 304, 314, 322, 331, 341, 350, 360, 369, 377, 387, 396, 406, 415, 425, 433, 442, 452, 461, 471, 480, 488, 498, 507, 517, 526, 536, 544, 553, 563, 572, 582, 591, 599, 609, 618, 628, 637, 645, 655, 664, 674, 683, 693, 701, 710, 720, 729, 739, 748, 756, 766

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OFFSET

1,1

COMMENTS

(See A189380.)

LINKS

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

MATHEMATICA

r=1; s=-1+2^(1/2); t=1+2^(1/2);

f[n_] := n + Floor[n*s/r] + Floor[n*t/r];

g[n_] := n + Floor[n*r/s] + Floor[n*t/s];

h[n_] := n + Floor[n*r/t] + Floor[n*s/t];