|
Search: id:A117476
|
|
|
| A117476 |
|
The values of a in a^2 + b^2 = c^2 where b - a = 23 and gcd(a,b,c)=1. |
|
+0
2
|
|
| 12, 33, 133, 252, 832, 1525, 4905, 8944, 28644, 52185, 167005, 304212, 973432, 1773133, 5673633, 10334632, 33068412, 60234705, 192736885, 351073644, 1123352944, 2046207205, 6547380825, 11926169632, 38160932052, 69510810633
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Values of c are in A117475
|
|
FORMULA
|
a(1)=12, a(2)=33, a(3)=133, a(4)=252, a(n) = 6*a(n-2) - a(n-4) + 46
|
|
EXAMPLE
|
a(5) = 6*133 - 12 + 46 = 832 and 832^2 + 855^2 = 1193^2 and 855-832=23 and gcd(832,855,1193)=1
|
|
CROSSREFS
|
Cf. A117475.
Sequence in context: A032604 A043161 A043941 this_sequence A122436 A063554 A059805
Adjacent sequences: A117473 A117474 A117475 this_sequence A117477 A117478 A117479
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Andras Erszegi (erszegi.andras(AT)chello.hu), Mar 19 2006
|
|
|
Search completed in 0.002 seconds
|
