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A051403 a(n) = (n+2)*(a(n-1)-a(n-2)). 0
0, 1, 3, 8, 25, 102, 539, 3496, 26613, 231170, 2250127, 24227484, 285705641, 3660694198, 50624828355, 751426146512, 11913622408669, 200919532718826, 3591112295892983, 67803855263483140, 1348467602319393297, 28174602435230023454, 617001101156944493611 (list; graph; refs; listen; history; text; internal format)
OFFSET

-1,3

COMMENTS

a(n) is a function of the left factorials A003422. [Gary Detlefs, Jun 23 2010]

LINKS

Table of n, a(n) for n=-1..21.

Alexsandar Petojevic, The Function vM_m(s; a; z) and Some Well-Known Sequences, Journal of Integer Sequences, Vol. 5 (2002), Article 02.1.7

FORMULA

a(n) = (n+2)* A003422(n+1) /2. [Gary Detlefs, Jun 23 2010]

MATHEMATICA

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 *)

CROSSREFS

Sequence in context: A182927 A012408 A184325 * A004205 A268114 A097713

Adjacent sequences:  A051400 A051401 A051402 * A051404 A051405 A051406

KEYWORD

nonn

AUTHOR

Aleksandar Petojevic.

EXTENSIONS

a(-1) & a(0) from Robert G. Wilson v, Jun 15 2013

STATUS

approved

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Last modified July 22 15:23 EDT 2019. Contains 325224 sequences. (Running on oeis4.)