%I #11 Sep 08 2022 08:45:10

%S 1,5,40,415,5300,80625,1426580,28830155,655940020,16606321525,

%T 463320312500,14130811169655,467881009873460,16718946913855385,

%U 641427749991418900,26301978778076171875,1148144301008330172980

%N a(n) = (4*(n+5)^n + n^n)/5.

%H Vincenzo Librandi, <a href="/A083304/b083304.txt">Table of n, a(n) for n = 0..300</a>

%o (Magma) [(4*(n+5)^n+n^n)/5: n in [0..25]]; // _Vincenzo Librandi_, Jun 29 2011

%o (PARI) a(n)=(4*(n+5)^n+n^n)/5 \\ _Charles R Greathouse IV_, Jun 29 2011

%Y Cf. A000312, A083305, A083306.

%K easy,nonn

%O 0,2

%A _Paul Barry_, Apr 24 2003