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A202306 Floor(sqrt(7*n)). 3
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 (list; graph; refs; listen; history; text; internal format)
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 * A275579 A198292 A020892

Adjacent sequences:  A202303 A202304 A202305 * A202307 A202308 A202309

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jan 17 2012

STATUS

approved

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Last modified June 15 08:52 EDT 2021. Contains 345048 sequences. (Running on oeis4.)