The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A200944 Number of 0..n arrays x(0..4) of 5 elements with nondecreasing average value and 0..n occur with instance counts within one of each other. 1

%I #12 Apr 21 2021 13:03:05

%S 2,9,17,8,44,151,398,890,1774,3246,5555,9016,14012,21005,30529,43228,

%T 59824,81159,108166,141927,183608,234553,296197,370168,458195,562234,

%U 684319,826757,991940,1182536,1401309,1651348,1935801,2258191,2622105

%N Number of 0..n arrays x(0..4) of 5 elements with nondecreasing average value and 0..n occur with instance counts within one of each other.

%C Row 5 of A200942.

%H R. H. Hardin, <a href="/A200944/b200944.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-2) +2*a(n-3) -a(n-4) -3*a(n-5) -a(n-6) +a(n-8) +a(n-9) +a(n-10) -a(n-11) -a(n-12) +a(n-13) +a(n-14) +a(n-15) -a(n-17) -3*a(n-18) -a(n-19) +2*a(n-20) +2*a(n-21) -a(n-23) for n>26.

%F Empirical g.f.: 2*x +9*x^2 +17*x^3 +x^4*(8+44*x +135*x^2+294*x^3 +508*x^4+744*x^5 +961*x^6+1122*x^7 +1203*x^8+1200*x^9 +1118*x^10+955*x^11 +734*x^12+496*x^13 +289*x^14+128*x^15 +35*x^16+x^17) / ( (x^2+1)*(x^4+x^3+x^2+x+1)*(x^4+1)*(1+x+x^2)^2*(1+x)^3*(x-1)^6 ). - R. J. Mathar, Nov 25 2011

%e Some solutions for n=8

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

%e ..2....2....1....1....2....2....2....2....2....2....4....4....5....1....2....4

%e ..7....7....3....8....1....8....3....5....1....5....2....5....3....3....5....5

%e ..3....4....2....5....6....4....4....4....4....7....7....3....6....4....6....6

%e ..4....5....6....7....8....7....5....3....7....8....5....8....4....2....8....7

%Y Cf. A200942.

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 24 2011

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 June 8 17:52 EDT 2024. Contains 373227 sequences. (Running on oeis4.)