|
|
A172331
|
|
Floor(n*(sqrt(13)+sqrt(7))).
|
|
1
|
|
|
0, 6, 12, 18, 25, 31, 37, 43, 50, 56, 62, 68, 75, 81, 87, 93, 100, 106, 112, 118, 125, 131, 137, 143, 150, 156, 162, 168, 175, 181, 187, 193, 200, 206, 212, 218, 225, 231, 237, 243, 250, 256, 262, 268, 275, 281, 287, 293, 300, 306, 312
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
Also integer part of n*6.2513025865..., where the constant is the largest root of x^4 -40*x^2 +36.
|
|
LINKS
|
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
|
|
MATHEMATICA
|
With[{c = Sqrt[13] + Sqrt[7]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)
|
|
PROG
|
(MAGMA) [Floor(n*(Sqrt(13)+Sqrt(7))): n in [0..60]];
|
|
CROSSREFS
|
Cf. A110117, A172323-A172332, A172334, A172336-A172338.
Sequence in context: A033003 A108592 A108593 * A038130 A246295 A108587
Adjacent sequences: A172328 A172329 A172330 * A172332 A172333 A172334
|
|
KEYWORD
|
nonn,easy,less
|
|
AUTHOR
|
Vincenzo Librandi, Feb 01 2010
|
|
STATUS
|
approved
|
|
|
|