A011927 - OEIS

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A011927 as a simple table

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	7
6	21
7	49
8	98
9	177
10	296
11	465
12	698
13	1009
14	1413
15	1927
16	2569
17	3360
18	4320
19	5472
20	6840
21	8449
22	10327
23	12501
24	15001
25	17858
26	21105
27	24776
28	28905
29	33530
30	38689
31	44421
32	50767
33	57769
34	65472
35	73920

[0,0,0,0,1,7,21,49,98,177,296,465,698,1009,1413, 1927,2569,3360,4320,5472,6840,8449,10327,12501, 15001,17858,21105,24776,28905,33530,38689,44421, 50767,57769,65472,73920]