A194986 a(n) = 1 + floor(n/sqrt(6)).

1, 1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 23, 23, 23, 24, 24, 25, 25, 25, 26, 26, 27, 27, 27, 28, 28, 29, 29, 29, 30, 30, 31

Offset

1,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..10000

Mathematica

p[n_]:=1+Floor[n/Sqrt[6]]
Table[p[n], {n, 1, 90}] (* A194986 *)

Prog

(Magma) [1+Floor(n/Sqrt(6)): n in [1..80] ]; // Vincenzo Librandi, Sep 10 2011
(PARI) a(n)=1+sqrtint(n^2\6) \\ Charles R Greathouse IV, Sep 02 2015

Crossrefs

Cf. A194987, A194988, A194989.

Sequence in context: A173276 A288156 A248515 * A302128 A054071 A028827

Adjacent sequences: A194983 A194984 A194985 * A194987 A194988 A194989

Keyword

nonn

Author

Clark Kimberling, Sep 07 2011

Status

approved