A098426 - cp's OEIS frontend

A098426 a(n)=(1/2)*sum(i=0,n,rad(binomial(n,i))) where rad(k)=A007947(k).

n	a(n)
1	1
2	2
3	4
4	6
5	16
6	27
7	64
8	66
9	94
10	287
11	1024
12	645
13	2380
14	6723
15	12094
16	7136
17	36772
18	38733
19	161254
20	241083
21	571714
22	1203173
23	4194304
24	2005009
25	2162496
26	8739877
27	6699838
28	27330423
29	112844656
30	41322885
31	252807388
32	201501336
33	419398108
34	2840231975

[1, 2, 4, 6, 16, 27, 64, 66, 94, 287, 1024, 645, 2380, 6723, 12094, 7136, 36772, 38733, 161254, 241083, 571714, 1203173, 4194304, 2005009, 2162496, 8739877, 6699838, 27330423, 112844656, 41322885, 252807388, 201501336, 419398108, 2840231975]

cp's OEIS Frontend

A098426 a(n)=(1/2)*sum(i=0,n,rad(binomial(n,i))) where rad(k)=A007947(k).

Table of values

List of values