|
| |
|
|
A144449
|
|
36*n^2 + 60*n + 16.
|
|
2
| |
|
|
16, 112, 280, 520, 832, 1216, 1672, 2200, 2800, 3472, 4216, 5032, 5920, 6880, 7912, 9016, 10192, 11440, 12760, 14152, 15616, 17152, 18760, 20440, 22192, 24016, 25912, 27880, 29920, 32032, 34216, 36472, 38800, 41200, 43672, 46216, 48832, 51520, 54280, 57112
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| A decimation: A061039(6n+5).
Multiples of 8.
a(n) mod 9 = period 3: repeat 7,4,1 = A070403(n+1).
|
|
|
LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
|
|
|
FORMULA
| a(n) = 4*(4+9*n^2+15*n), with n>=0 [From Paolo P. Lava, Oct 28 2008]
a(n)=a(n-1)+24*(3n+1)=a(n-1)+72n+24, a(0)=16.
A061039(6n+2) = A061039(6n-4)+24*(3n+1) = a(6n-4)+72n+24, a(2)=16.
|
|
|
PROG
| (MAGMA) [36*n^2 + 60*n + 16: n in [0..40]]; // Vincenzo Librandi, Aug 07 2011
|
|
|
CROSSREFS
| Sequence in context: A053526 A107908 A177046 * A000143 A035016 A205964
Adjacent sequences: A144446 A144447 A144448 * A144450 A144451 A144452
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Oct 06 2008
|
|
|
EXTENSIONS
| Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Jul 25 2010
|
| |
|
|
