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a(n) = (n!+5)/5.
4

%I #10 Oct 14 2024 01:38:27

%S 25,145,1009,8065,72577,725761,7983361,95800321,1245404161,

%T 17435658241,261534873601,4184557977601,71137485619201,

%U 1280474741145601,24329020081766401,486580401635328001,10218188434341888001

%N a(n) = (n!+5)/5.

%H Amiram Eldar, <a href="/A139152/b139152.txt">Table of n, a(n) for n = 5..450</a>

%t Table[(n! + 5)/5, {n, 5, 30}]

%Y Cf. A007749, A020458, A082672, A089085, A089130, A117141, A139056-A139066, A139068, A137390, A139070-A139075, A139148-A139157, A139159, A139160-A139162.

%K nonn

%O 5,1

%A _Artur Jasinski_, Apr 11 2008

%E Name corrected by _Amiram Eldar_, Oct 14 2024