|
|
A060903
|
|
Floor(6*n*sqrt(n)/Pi^2).
|
|
1
|
|
|
0, 0, 1, 3, 4, 6, 8, 11, 13, 16, 19, 22, 25, 28, 31, 35, 38, 42, 46, 50, 54, 58, 62, 67, 71, 75, 80, 85, 90, 94, 99, 104, 110, 115, 120, 125, 131, 136, 142, 148, 153, 159, 165, 171, 177, 183, 189, 195, 202, 208, 214, 221, 227, 234, 241, 247, 254, 261, 268, 275, 282
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
COMMENTS
|
Conjecture: the sum of the divisors of n is less than a(n) for n exceeding 12. - Robert G. Wilson v, May 14 2014
|
|
LINKS
|
|
|
FORMULA
|
a(n) = floor(6*n^(3/2)/Pi^2).
|
|
MATHEMATICA
|
|
|
PROG
|
(PARI) { default(realprecision, 100); t=Pi^2/6; for (n=0, 1000, write("b060903.txt", n, " ", n*sqrt(n)\t); ) } // Harry J. Smith, Jul 14 2009
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|