|
Search: id:A109614
|
|
|
| A109614 |
|
n^3 followed by n followed by n^2. |
|
+0
2
|
|
| 1, 1, 1, 8, 2, 4, 27, 3, 9, 64, 4, 16, 125, 5, 25, 216, 6, 36, 343, 7, 49, 512, 8, 64, 729, 9, 81, 1000, 10, 100, 1331, 11, 121, 1728, 12, 144, 2197, 13, 169, 2744, 14, 196, 3375, 15, 225, 4096, 16, 256, 4913, 17, 289, 5832, 18, 324, 6859, 19, 361, 8000, 20, 400
(list; graph; listen)
|
|
|
OFFSET
|
1,4
|
|
|
FORMULA
|
a(n)=4*a(n-3)-6*a(n-6)+4*a(n-9)-a(n-12). G.f.: -(-1-x-x^2-4*x^3+2*x^4-x^6-x^7+x^8)/((x-1)^4*(1+x+x^2)^4). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 26 2009]
|
|
EXAMPLE
|
1,1,1,8,2,4,125,5,25
|
|
CROSSREFS
|
Cf. A000463.
Sequence in context: A073440 A021552 A008830 this_sequence A020787 A002994 A097408
Adjacent sequences: A109611 A109612 A109613 this_sequence A109615 A109616 A109617
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Mohammad K. Azarian (azarian(AT)evansville.edu), Aug 30 2005
|
|
|
Search completed in 0.002 seconds
|
