A202306 Floor(sqrt(7*n)).

0, 2, 3, 4, 5, 5, 6, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 21

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Formula

a(n) = A000196(7n).

Mathematica

Table[Floor[Sqrt[7n]], {n, 0, 80}].

Prog

(Magma) [Floor(Sqrt(7*n)) : n in [0..80]]; \
(PARI) a(n)=sqrtint(7*n) \\ Charles R Greathouse IV, Jan 17 2012

Crossrefs

Cf. A172471, A202304, A202305.

Sequence in context: A138370 A125051 A064067 * A373178 A275579 A198292

Adjacent sequences: A202303 A202304 A202305 * A202307 A202308 A202309

Keyword

nonn,easy

Author

Vincenzo Librandi, Jan 17 2012

Status

approved