|
|
A083141
|
|
Main diagonal of array in A083140.
|
|
7
|
|
|
2, 9, 35, 91, 209, 377, 629, 817, 1219, 1769, 2201, 2923, 3649, 4343, 5029, 5989, 7729, 8479, 10117, 11573, 12629, 14299, 16019, 17711, 21631, 23129, 24617, 26857, 28667, 30623, 35687, 38383, 42607, 44063, 50213, 52699, 56363, 60799, 63961, 68681
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
FORMULA
|
a(n) = prime(n)*prime(2*n-2).
|
|
MATHEMATICA
|
Table[ Prime[n]*Prime[2n - 2], {n, 2, 41}]
|
|
PROG
|
(PARI) vector(50, n, if (n==1, 2, prime(n)*prime(2*n-2))) \\ Michel Marcus, Dec 19 2014
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|