A101870 Row 3 of A101866.

13, 26, 34, 47, 60, 68, 81, 89, 102, 115, 123, 136, 149, 157, 170, 178, 191, 204, 212, 225, 233, 246, 259, 267, 280, 293, 301, 314, 322, 335, 348, 356, 369, 382, 390, 403, 411, 424, 437, 445, 458, 466, 479, 492, 500, 513, 526, 534, 547, 555, 568, 581, 589, 602, 610, 623

Offset: 1

Author

N. J. A. Sloane, Jan 28 2005

Keywords

• nonn

Links

• Paolo Xausa, Table of n, a(n) for n = 1..10000

Programs

Mathematica

Array[3*# + 5*Ceiling[#*GoldenRatio] &, 100] (* Paolo Xausa, Mar 20 2024 *)

Formula

a(n) = 3*n + 5*ceiling(n*(1 + sqrt(5))/2). - Paolo Xausa, Mar 20 2024