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!)
A134284 A certain partition array in Abramowitz-Stegun order (A-St order), called M_0(3)/M_0. 2

%I #13 Aug 30 2019 04:02:11

%S 1,3,1,10,3,1,35,10,9,3,1,126,35,30,10,9,3,1,462,126,105,100,35,30,27,

%T 10,9,3,1,1716,462,378,350,126,105,100,90,35,30,27,10,9,3,1,6435,1716,

%U 1386,1260,1225,462,378,350,315,300,126,105,100,90,81,35,30,27,10,9,3,1

%N A certain partition array in Abramowitz-Stegun order (A-St order), called M_0(3)/M_0.

%C The sequence of row lengths is A000041 (partition numbers) [1, 2, 3, 5, 7, 11, 15, 22, 30, 42, ...].

%C For the A-St order of partitions see the Abramowitz-Stegun reference given in A117506.

%C Partition number array M_0(3)= A134283 with each entry divided by the corresponding one of the partition number array M_0 = M_0(2) = A048996; in short M_0(3)/M_0.

%H M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

%H W. Lang, <a href="/A134284/a134284.txt">First 10 rows and more</a>.

%F a(n,k) = Product_{j=1..n} s2(3,j,1)^e(n,k,j) with s2(3,n,1) = A035324(n,1) = A001700(n-1) = binomial(2*n-1,n) and with the exponent e(n,k,j) of j in the k-th partition of n in the A-St ordering of the partitions of n.

%F a(n,k) = A134283(n,k)/A048996(n,k) (division of partition arrays M_0(3) by M_0).

%e [1]; [3,1]; [10,3,1]; [35,10,9,3,1]; [126,35,30,10,9,3,1]; ...

%e a(4,3) = 9 = 3^2 because (2^2) is the k=4 partition of n=4 in A-St order and s2(3,2,1)=3.

%Y Cf. A134826 (row sums coinciding with those of triangle A134285).

%K nonn,easy,tabf

%O 1,2

%A _Wolfdieter Lang_, Nov 13 2007

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 May 29 14:40 EDT 2024. Contains 372952 sequences. (Running on oeis4.)