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A165995 a(n) = Sum_{p > n} floor(n^2/p), for primes p. 1
0, 1, 2, 7, 9, 16, 19, 28, 40, 54, 60, 76, 81, 100, 121, 143, 151, 177, 184, 210, 241, 272, 281, 314, 349, 386, 424, 465, 480, 522, 538, 582, 628, 677, 728, 782, 800, 856, 910, 970, 991, 1051, 1072, 1133, 1198, 1263, 1285, 1353, 1424, 1497, 1571 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Also the number of integers between n and n^2 with a prime factor > n. - Orson R. L. Peters, Dec 04 2017

LINKS

C. H. Gribble, Table of j, a(j) for j=1..2236.

MATHEMATICA

Block[{nn = 51, s}, s = Array[FactorInteger[#][[All, 1]] &, nn^2]; Table[Count[s[[#]] & /@ Range[n, n^2], _?(AnyTrue[#, # > n &] &)], {n, nn}]] (* Michael De Vlieger, Dec 04 2017 *)

CROSSREFS

Cf. A165974.

Sequence in context: A225675 A185869 A020894 * A287575 A267212 A022113

Adjacent sequences:  A165992 A165993 A165994 * A165996 A165997 A165998

KEYWORD

nonn

AUTHOR

Christopher Hunt Gribble, Oct 03 2009

EXTENSIONS

Definition corrected by Orson R. L. Peters, Dec 04 2017

STATUS

approved

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Last modified September 27 15:29 EDT 2020. Contains 337383 sequences. (Running on oeis4.)