A280723 - cp's OEIS frontend

A280723 a(n) is the denominator of 6 * Sum_{k=0..n} ((k+1)/(n-k+1)^2) * (Catalan(k)/(2^(2*k+1)))^2.

n	a(n)
0	2
1	16
2	384
3	6144
4	819200
5	19660800
6	7707033600
7	3288334336
8	14205604331520
9	568224173260800
10	3741775508275200
11	179605224397209600
12	135982707495615332352
13	1410191040695270113280
14	169222924883432413593600
15	10830267192539674469990400
16	1655509272671188586751590400

[2, 16, 384, 6144, 819200, 19660800, 7707033600, 3288334336, 14205604331520, 568224173260800, 3741775508275200, 179605224397209600, 135982707495615332352, 1410191040695270113280, 169222924883432413593600, 10830267192539674469990400, 1655509272671188586751590400]

cp's OEIS Frontend

A280723 a(n) is the denominator of 6 * Sum_{k=0..n} ((k+1)/(n-k+1)^2) * (Catalan(k)/(2^(2*k+1)))^2.

Table of values

List of values