|
Search: id:A094351
|
|
|
| A094351 |
|
Rearrangement of integers such that a(1)!*a(2)!...a(n)! + 1 is prime. |
|
+0
2
|
|
| 0, 1, 2, 3, 6, 9, 10, 7, 29, 4, 45, 84, 12, 78, 182, 20, 21, 484, 803
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
COMMENT
|
Next term is greater than 888. - Farideh Firoozbakht (mymontain(AT)yahoo.com), Oct 19 2006
|
|
EXAMPLE
|
a(4) = 6 as 1!*2!*3!*6! + 1 = 8641 is a prime but 1!*2!*3!*4! + 1= 289 is not.
|
|
MATHEMATICA
|
v={0}; Print[0]; Do[a=Product[v[[k]]!, {k, n}]; For[m=1, MemberQ[v, m] ||!PrimeQ[1 + m!a], m++ ]; AppendTo[v, m]; Print[m], {n, 19}] - Farideh Firoozbakht (mymontain(AT)yahoo.com), Oct 19 2006
|
|
CROSSREFS
|
Cf. A094352.
Sequence in context: A087494 A021426 A097108 this_sequence A061910 A007086 A047404
Adjacent sequences: A094348 A094349 A094350 this_sequence A094352 A094353 A094354
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 22 2004
|
|
EXTENSIONS
|
More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Oct 19 2006
|
|
|
Search completed in 0.002 seconds
|
