|
Search: id:A134632
|
|
|
| A134632 |
|
5*n^5 + 3*n^3 - 2*n^2. Coefficients and exponents are the prime numbers in decreasing order. |
|
+0
1
|
|
| 0, 6, 176, 1278, 5280, 15950, 39456, 84966, 165248, 297270, 502800, 809006, 1249056, 1862718, 2696960, 3806550, 5254656, 7113446, 9464688
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
FORMULA
|
a(n) = 5*n^5 + 3*n^3 - 2*n^2.
G.f.: 2x*(3+70x+156x^2+66x^3+5x^4)/(1-x)^6. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
|
|
EXAMPLE
|
a(4)=5280 because 4^5=1024, 5*1024=5120, 4^3=64, 3*64=192, 4^2=16, 2*16=32 and we can write 5120+192-32=5280.
|
|
CROSSREFS
|
Cf. A000290, A000578, A000584, A045991, A100019, A133072.
Adjacent sequences: A134629 A134630 A134631 this_sequence A134633 A134634 A134635
Sequence in context: A002884 A055165 A071095 this_sequence A024277 A012177 A012227
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Omar E. Pol (info(AT)polprimos.com), Nov 04 2007
|
|
|
Search completed in 0.002 seconds
|
