|
Search: id:A073443
|
|
| |
| |
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
Clearly n <> 2 (mod 3). For n>3, n!-n, n!-n+1, ..., n!-3, n!-2 is a sequence of n-1 consecutive composite numbers. Additional terms are greater than 2000.
|
|
PROGRAM
|
(PARI) for(n=3, 2000, if(isprime(n!-n-1), print1(n, ", ")))
|
|
CROSSREFS
|
Cf. A073444 (corresponding primes), A002982 (n!-1 is prime), A073308 (n!+n+1 is prime).
Sequence in context: A101506 A092434 A031367 this_sequence A092119 A143372 A035594
Adjacent sequences: A073440 A073441 A073442 this_sequence A073444 A073445 A073446
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jul 31 2002
|
|
|
Search completed in 0.002 seconds
|
