|
Search: id:A143859
|
|
|
| A143859 |
|
Ulam/prime spiral (WNW). |
|
+0
1
|
|
| 1, 18, 67, 148, 261, 406, 583, 792, 1033, 1306, 1611, 1948, 2317, 2718, 3151, 3616, 4113, 4642, 5203, 5796, 6421, 7078, 7767, 8488, 9241, 10026, 10843, 11692, 12573, 13486, 14431, 15408, 16417, 17458, 18531, 19636, 20773, 21942, 23143, 24376
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
FORMULA
|
a(n)=16n^2-31n+16. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 08 2008]
|
|
MATHEMATICA
|
lst={1}; a=2; Do[AppendTo[lst, n*n+a]; a++, {n, 4, 6!, 4}]; lst
|
|
CROSSREFS
|
Sequence in context: A010006 A044156 A044537 this_sequence A063523 A045234 A158056
Adjacent sequences: A143856 A143857 A143858 this_sequence A143860 A143861 A143862
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 03 2008
|
|
|
Search completed in 0.002 seconds
|
