|
|
A088120
|
|
Smallest prime obtained as a product of n terms of an arithmetic progression + the common difference.
|
|
1
|
|
|
2, 3, 7, 107, 947, 20161, 604801, 6652801, 726485761, 39916801, 39916801, 316234143227, 14820309504001, 10461394944001, 641171050071552001, 425757851430912001, 9366672731480064001, 8515157028618240001
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Conjectures: (1) Sequence is infinite. (2) The common difference arising = 1 except for n = 4 and 5 in which case it is 2.
|
|
LINKS
|
|
|
EXAMPLE
|
a(4) = 1*3*5*7 + 2 = 107. a(5) = 1*3*5*7*9 + 2,
a(6) = 5*6*7*8*9*10 + 1 = 151201.
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|