A097882 a(n) = floor( n^2/prime(n) ).

0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 16

Offset

1,4

Links

G. C. Greubel, Table of n, a(n) for n = 1..1000

Formula

a(n) = floor(A000290(n)/A000040(n)).

A000290(n) = a(n)*A000040(n)) + A069547(n).

Mathematica

Table[Floor[n^2/Prime[n]], {n, 1, 50}] (* G. C. Greubel, May 21 2017 *)

Prog

(PARI) for(n=1, 50, print1(floor(n^2/prime(n)), ", ")) \\ G. C. Greubel, May 21 2017

Crossrefs

Cf. A000040, A000290, A001221, A069547.

Sequence in context: A227568 A232746 A052146 * A108955 A108956 A289133

Adjacent sequences: A097879 A097880 A097881 * A097883 A097884 A097885

Keyword

nonn

Author

Reinhard Zumkeller, Sep 02 2004

Status

approved