|
Search: id:A133070
|
|
|
| A133070 |
|
n^5-n^3-n^2. (Exponents are the prime numbers in decreasing order). |
|
+0
3
|
|
| 0, -1, 20, 207, 944, 2975, 7524, 16415, 32192, 58239, 98900, 159599, 246960, 368927, 534884, 755775, 1044224, 1414655, 1883412, 2468879, 3191600, 4074399, 5142500, 6423647, 7948224, 9749375
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
FORMULA
|
a(n) = n^5-n^3-n^2
G.f.: x*(-1+72*x^2+22*x^3+26*x+x^4)/(x-1)^6. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
|
|
EXAMPLE
|
a(7)=16415 because 7^5=16807, 7^3=343, 7^2=49 and we can write 16807-343-49=16415.
|
|
CROSSREFS
|
Cf. A000290, A000578, A000584, A011379, A045991, A100019.
Sequence in context: A099197 A041766 A121088 this_sequence A135179 A074668 A139620
Adjacent sequences: A133067 A133068 A133069 this_sequence A133071 A133072 A133073
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
Omar E. Pol (info(AT)polprimos.com), Nov 01 2007
|
|
|
Search completed in 0.002 seconds
|
