A103355 a(n) = n - floor( sqrt(prime(n) ) ).

0, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 14, 14, 15, 16, 16, 17, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 26, 27, 27, 28, 29, 30, 31, 31, 32, 33, 34, 34, 35, 36, 37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 49, 50, 51, 52, 53, 54, 54, 55

Offset

1,4

Links

Table of n, a(n) for n=1..74.

Mathematica

Table[n - Floor[Sqrt[Prime[n]]], {n, 100}] (* Wesley Ivan Hurt, Apr 20 2023 *)

Crossrefs

Sequence in context: A077467 A005378 A247911 * A347707 A029092 A280814

Adjacent sequences: A103352 A103353 A103354 * A103356 A103357 A103358

Keyword

easy,nonn

Author

Giovanni Teofilatto, Mar 20 2005

Extensions

Corrected and extended by Ray Chandler, May 18 2005

Status

approved