[go: up one dir, main page]

login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Natural numbers of the form (prime(n)! - 5)/5.
18

%I #6 Oct 03 2015 23:17:30

%S 23,1007,7983359,1245404159,71137485619199,24329020081766399,

%T 5170403347776995327999,1768352398747940390908723199999,

%U 1644567730835584563545112575999999

%N Natural numbers of the form (prime(n)! - 5)/5.

%p A039716 := proc(n) factorial(ithprime(n)) ; end: A139193 := proc(n) A039716(n)/5-1 ; end: seq(A139193(n),n=3..14) ; # _R. J. Mathar_, Sep 18 2009

%t Table[(Prime[n]! - 5)/5, {n, 3, 20}]

%Y Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.

%K nonn

%O 1,1

%A _Artur Jasinski_, Apr 11 2008