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A063038 Floor(n*sqrt(n)) - d(n), where d(n) is the number of divisors function. 0
0, 0, 3, 5, 9, 10, 16, 18, 24, 27, 34, 35, 44, 48, 54, 59, 68, 70, 80, 83, 92, 99, 108, 109, 122, 128, 136, 142, 154, 156, 170, 175, 185, 194, 203, 207, 223, 230, 239, 244, 260, 264, 279, 285, 295, 307, 320, 322, 340, 347, 360, 368, 383, 388, 403, 411, 426, 437 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..58.

MATHEMATICA

Table[Floor[n*Sqrt[n]] - DivisorSigma[0, n], {n, 50}] (* Wesley Ivan Hurt, Jun 09 2014 *)

PROG

(PARI) j=[]; for(n=1, 100, j=concat(j, floor(n*sqrt(n))-numdiv(n))); j

CROSSREFS

Cf. A055682.

Sequence in context: A286065 A316296 A344293 * A236309 A304588 A335058

Adjacent sequences:  A063035 A063036 A063037 * A063039 A063040 A063041

KEYWORD

easy,nonn

AUTHOR

Jason Earls, Aug 03 2001

STATUS

approved

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Last modified August 8 16:09 EDT 2022. Contains 356015 sequences. (Running on oeis4.)