A349499 Numbers k such that A349474(k) = A349474(k+1).

2, 7, 10, 14, 19, 22, 56, 59, 60, 63, 65, 66, 67, 68, 69, 70, 76, 77, 81, 104, 109, 113, 114, 123, 125, 137, 138, 154, 155, 164, 171, 184, 185, 187, 190, 195, 199, 210, 217, 221, 230, 232, 236, 248, 251, 255, 257, 274, 276, 280, 281, 282, 290, 293, 295, 301, 306

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Example

2 is a term since A349474(2) = A349474(3) = 2.
7 is a term since A349474(7) = A349474(8) = 3.

Mathematica

c[n_] := Length @ ContinuedFraction[DivisorSigma[0, n]/DivisorSigma[-1, n]]; Select[Range[350], c[#] == c[# + 1] &]

Crossrefs

Cf. A349473, A349474.

Sequence in context: A303741 A085303 A304799 * A022886 A047524 A190447

Adjacent sequences: A349496 A349497 A349498 * A349500 A349501 A349502

Keyword

nonn

Author

Amiram Eldar, Nov 20 2021

Status

approved