A277721 a(n) = floor(n*t^3) - A003146(n), where t = 1.8392867... is the tribonacci constant A058265.

2, 1, 1, 0, 3, 2, 2, 1, 1, 1, 0, 2, 1, 2, 1, 1, 0, 3, 2, 2, 1, 0, 1, 0, 2, 1, 2, 1, 3, 2, 2, 2, 1, 1, 0, 3, 2, 2, 1, 1, 1, 3, 2, 2, 2, 1, 1, 0, 2, 2, 2, 1, 0, 1, 0, 2, 1, 1, 1, 1, 0, 2, 2, 2, 1, 0, 0, 0, 2, 1, 1, 1, 3, 2, 2, 1, 1, 1, 0, 2, 2, 2, 1, 1, 0, 3, 2, 2, 1, 1, 1, 0, 2, 1, 2, 1, 1, 0, 3, 2

Offset: 1

Author

N. J. A. Sloane, Oct 28 2016

Keywords

• sign

Comments

Always in the set {-1,0,1,2,3}, but first occurrence of -1 is at n = 2047. - Jeffrey Shallit, Nov 19 2016

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A003144, A003145, A003146, A275926, A276799, A058265, A276800, A276801, A278353 (positions of -1's).