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A051403 a(n) = (n+2)*(a(n-1)-a(n-2)). 0

%I

%S 0,1,3,8,25,102,539,3496,26613,231170,2250127,24227484,285705641,

%T 3660694198,50624828355,751426146512,11913622408669,200919532718826,

%U 3591112295892983,67803855263483140,1348467602319393297,28174602435230023454,617001101156944493611

%N a(n) = (n+2)*(a(n-1)-a(n-2)).

%C a(n) is a function of the left factorials A003422. [_Gary Detlefs_, Jun 23 2010]

%H Alexsandar Petojevic, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL5/Petojevic/petojevic5.html">The Function vM_m(s; a; z) and Some Well-Known Sequences</a>, Journal of Integer Sequences, Vol. 5 (2002), Article 02.1.7

%F a(n) = (n+2)* A003422(n+1) /2. [_Gary Detlefs_, Jun 23 2010]

%t RecurrenceTable[{a[0]==1, a[-1]==0, a[n]==(n+2)(a[n-1]-a[n-2])},a[n],{n,-1,21}] (* _Harvey P. Dale_, Aug 24 2011 *)

%K nonn

%O -1,3

%A Aleksandar Petojevic.

%E a(-1) & a(0) from _Robert G. Wilson v_, Jun 15 2013

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)