|
|
A138423
|
|
a(n) = (prime(n)^4 - prime(n)^3)/2.
|
|
3
|
|
|
4, 27, 250, 1029, 6655, 13182, 39304, 61731, 133837, 341446, 446865, 911754, 1378420, 1669647, 2387929, 3870802, 5955991, 6809430, 9925179, 12526885, 14004612, 19228521, 23443267, 31018636, 43808304, 51515050, 55729077
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
a = {}; Do[p = Prime[n]; AppendTo[a, (p^4 - p^3)/2], {n, 1, 50}]; a
|
|
PROG
|
(Magma) [(NthPrime((n))^4 - NthPrime((n))^3)/2: n in [1..30] ]; // Vincenzo Librandi, Jun 18 2011
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|