|
|
A248469
|
|
Floor((2*n^2)/e).
|
|
0
|
|
|
0, 2, 6, 11, 18, 26, 36, 47, 59, 73, 89, 105, 124, 144, 165, 188, 212, 238, 265, 294, 324, 356, 389, 423, 459, 497, 536, 576, 618, 662, 707, 753, 801, 850, 901, 953, 1007, 1062, 1119, 1177, 1236, 1297, 1360, 1424, 1489, 1556, 1625, 1695, 1766, 1839
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
FORMULA
|
a(n) = floor((2*n^2)/e).
|
|
MATHEMATICA
|
|
|
PROG
|
(Java) int a(int n) {return (int) ((2*Math.pow(x, 2))/Math.exp(1.0)); }
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|