A054291 Positions of 5's in the decimal expansion of (1+sqrt(5))/2.

23, 31, 49, 58, 67, 105, 112, 120, 134, 156, 167, 169, 173, 178, 205, 215, 242, 264, 277, 282, 285, 295, 298, 329, 331, 338, 353, 368, 388, 393, 395, 408, 416, 450, 453, 469, 487, 507, 516, 524, 527, 539, 555, 570, 580, 587, 627, 634, 651, 659, 672, 678, 687

Offset: 1

Author

Simon Plouffe, Feb 20 2000

Keywords

• nonn
• base

Links

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

Crossrefs

Cf. A001622.

Programs

Mathematica

Flatten[Position[RealDigits[GoldenRatio, 10, 500][[1]], 5]] (* G. C. Greubel, Jul 31 2019 *)