login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Total sum of the numbers of partitions with positive k-th ranks of all partitions of n.
6

%I #11 Mar 30 2012 17:37:36

%S 0,2,3,6,10,18,27,45,65,99,141,206,285,403,549,754,1011,1364,1800,

%T 2388,3116,4072,5257,6791,8678,11093,14058,17800,22380,28111,35087,

%U 43748,54256,67189,82831,101962,124997,153011,186632,227281,275905,334418,404159,487714

%N Total sum of the numbers of partitions with positive k-th ranks of all partitions of n.

%C For the definition of k-th rank see A208478.

%e For n = 4 the partitions of 4 and the four types of ranks of the partitions of 4 are

%e ----------------------------------------------------------

%e Partitions First Second Third Fourth

%e of 4 rank rank rank rank

%e ----------------------------------------------------------

%e 4 4-1 = 3 0-1 = -1 0-1 = -1 0-1 = -1

%e 3+1 3-2 = 1 1-1 = 0 0-1 = -1 0-0 = 0

%e 2+2 2-2 = 0 2-2 = 0 0-0 = 0 0-0 = 0

%e 2+1+1 2-3 = -1 1-1 = 0 1-0 = 1 0-0 = 0

%e 1+1+1+1 1-4 = -3 1-0 = 1 1-0 = 1 1-0 = 1

%e ----------------------------------------------------------

%e The number of partitions of 4 with positive k-th ranks are 2, 1, 2, 1 so the total sum is a(4) = 2+1+2+1 = 6.

%Y Row sums of A208478.

%Y Cf. A208482, A208483.

%K nonn

%O 1,2

%A _Omar E. Pol_, Mar 07 2012

%E More terms from _Alois P. Heinz_, Mar 11 2012