login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A211565 Number of nonnegative integer arrays of length n+5 with new values 0 upwards introduced in order, and containing the value n-1. 1

%I #7 Nov 20 2014 19:34:43

%S 203,876,4012,17866,72028,256565,810470,2300949,5957407,14253254,

%T 31865787,67190359,134640766,258034213,475437305,845940194,1458930243,

%U 2446555288,4000200734,6391955256,10002207736,15354704197,23160598840

%N Number of nonnegative integer arrays of length n+5 with new values 0 upwards introduced in order, and containing the value n-1.

%C Row 6 of A211561.

%H R. H. Hardin, <a href="/A211565/b211565.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = (1/3840)*n^10 + (11/2304)*n^9 + (11/288)*n^8 + (1099/5760)*n^7 + (2909/3840)*n^6 + (31511/11520)*n^5 + (3365/384)*n^4 + (66703/2880)*n^3 + (13663/288)*n^2 + (8149/120)*n + 52.

%F Empirical: a(n) = sum{j in n..n+5} stirling2(n+5,j).

%e Some solutions for n=5:

%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

%e ..1....1....1....1....1....1....1....1....1....1....0....1....1....1....1....1

%e ..2....2....2....2....2....2....2....2....2....2....1....2....2....2....2....0

%e ..2....1....2....3....2....3....1....0....3....3....2....0....1....3....3....1

%e ..1....3....3....2....1....3....1....3....4....4....3....1....1....4....4....2

%e ..3....4....4....4....3....4....3....4....1....5....0....3....3....1....2....3

%e ..4....3....4....4....1....1....3....0....5....6....4....2....3....5....5....1

%e ..1....1....3....4....2....5....2....3....1....7....5....4....1....0....3....3

%e ..4....3....5....5....1....4....3....2....3....8....0....4....2....3....1....0

%e ..3....2....5....5....4....5....4....5....2....2....6....2....4....4....0....4

%Y Cf. A211561.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 15 2012

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 18:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)