|
Search: id:A105040
|
|
|
| A105040 |
|
Nonnegative n such that 7*n^2 + 7*n + 1 is a square. |
|
+0
5
|
| |
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
3936 = 254*15 + 111 + 15, 28320 = 254*111 + 111 + 15, 999855 = 254*3936 + 111, 7193295 = 254*28320 + 15.
|
|
PROGRAM
|
(PARI) for(n=0, 7193295, if(issquare(7*n*(n+1)+1), print1(n, ", ")))
|
|
CROSSREFS
|
Adjacent sequences: A105037 A105038 A105039 this_sequence A105041 A105042 A105043
Sequence in context: A054367 A034184 A092646 this_sequence A105051 A110822 A001849
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Gerald McGarvey (Gerald.McGarvey(AT)comcast.net), Apr 03 2005
|
|
|
Search completed in 0.002 seconds
|
