login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A112488 Third column of triangle A112486 used for e.g.f.s of |Stirling1| = |A008275| diagonals. 2
3, 35, 340, 3304, 33740, 367884, 4302216, 53961336, 724534272, 10386470016, 158507316864, 2567670088320, 44027031755520, 796963357981440, 15192135816261120, 304269507433658880, 6388907821376256000 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 2..445

FORMULA

a(n) = A112486(n, 2), n>=2. a(0)=0=a(1).

a(n) = (n+2)*a(n-1) + (n+1)*A001705(n-1), n>=2, a(1):=0.

EXAMPLE

340 = a(4) = 6*35 + 5*26.

MATHEMATICA

A112486[n_, k_] :=  A112486[n, k] = Which[n < 0 || k < 0 || k > n, 0, n == 0, 1, True, (n + k)*A112486[n - 1, k] + (n + k - 1)*A112486[n - 1, k - 1]]; Table[A112486[n, 2], {n, 2, 50}] (* G. C. Greubel, Jan 21 2017 *)

CROSSREFS

Sequence in context: A289950 A308033 A198961 * A221922 A260586 A089933

Adjacent sequences:  A112485 A112486 A112487 * A112489 A112490 A112491

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Sep 12 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 05:02 EDT 2021. Contains 346442 sequences. (Running on oeis4.)