cp's OEIS Frontend

A194447 Rank of the n-th region of the set of partitions of j, if 1<=n<=A000041(j).

%I A194447 #54 Nov 30 2013 21:30:33
%S A194447 0,0,0,1,-1,2,-2,1,2,2,-5,2,3,3,-8,1,2,2,2,4,3,-14,2,3,3,3,2,4,4,-21,
%T A194447 1,2,2,2,4,3,1,3,5,5,4,-32,2,3,3,3,2,4,4,1,4,3,5,6,5,-45,1,2,2,2,4,3,
%U A194447 1,3,5,5,4,-2,2,4,4,5,3,6,6,5,-65
%N A194447 Rank of the n-th region of the set of partitions of j, if 1<=n<=A000041(j).
%C A194447 Here the rank of a "region" is defined to be the largest part minus the number of parts (the same idea as the Dyson's rank of a partition).
%C A194447 Also triangle read by rows: T(j,k) = rank of the k-th region of the last section of the set of partitions of j.
%C A194447 The sum of every row is equal to zero.
%C A194447 Note that in some rows there are several negative terms. - _Omar E. Pol_, Oct 27 2012
%C A194447 For the definition of "region" see A206437. See also A225600 and A225610. - _Omar E. Pol_, Aug 12 2013
%F A194447 a(n) = A141285(n) - A194446(n). - Omar E. Pol, Dec 05 2011
%e A194447 In the triangle T(j,k) for j = 6 the number of regions in the last section of the set of partitions of 6 is equal to 4. The first region given by [2] has rank 2-1 = 1. The second region given by [4,2] has rank 4-2 = 2. The third region given by [3] has rank 3-1 = 2. The fourth region given by [6,3,2,2,1,1,1,1,1,1,1] has rank 6-11 = -5 (see below):
%e A194447 From _Omar E. Pol_, Aug 12 2013: (Start)
%e A194447 ---------------------------------------------------------
%e A194447 .    Regions       Illustration of ranks of the regions
%e A194447 ---------------------------------------------------------
%e A194447 .    For J=6        k=1     k=2      k=3        k=4
%e A194447 .  _ _ _ _ _ _                              _ _ _ _ _ _
%e A194447 . |_ _ _      |                     _ _ _   .          |
%e A194447 . |_ _ _|_    |           _ _ _ _   * * .|    .        |
%e A194447 . |_ _    |   |     _ _   * * .  |              .      |
%e A194447 . |_ _|_ _|_  |     * .|        .|                .    |
%e A194447 .           | |                                     .  |
%e A194447 .           | |                                       .|
%e A194447 .           | |                                       *|
%e A194447 .           | |                                       *|
%e A194447 .           | |                                       *|
%e A194447 .           | |                                       *|
%e A194447 .           |_|                                       *|
%e A194447 .
%e A194447 So row 6 lists:     1       2         2              -5
%e A194447 (End)
%e A194447 Written as a triangle begins:
%e A194447 0;
%e A194447 0;
%e A194447 0;
%e A194447 1,-1;
%e A194447 2,-2;
%e A194447 1,2,2,-5;
%e A194447 2,3,3,-8;
%e A194447 1,2,2,2,4,3,-14;
%e A194447 2,3,3,3,2,4,4,-21;
%e A194447 1,2,2,2,4,3,1,3,5,5,4,-32;
%e A194447 2,3,3,3,2,4,4,1,4,3,5,6,5,-45;
%e A194447 1,2,2,2,4,3,1,3,5,5,4,-2,2,4,4,5,3,6,6,5,-65;
%e A194447 2,3,3,3,2,4,4,1,4,3,5,6,5,-3,3,5,5,4,5,4,7,7,6,-88;
%Y A194447 Row j has length A187219(j). The absolute value of the last term of row j is A000094(j+1). Row sums give A000004.
%Y A194447 Cf. A000041, A002865, A135010, A138121, A138137, A138879, A186114, A186412, A193870, A194436, A194437, A194438, A194439, A194446, A206437.
%K A194447 sign,tabf
%O A194447 1,6
%A A194447 _Omar E. Pol_, Dec 04 2011