A080692 - cp's OEIS frontend

A080692 a(n)=(-1)^(n+1)*det(M(n)) where M(n) is the n X n matrix M(i,j)=min(abs(i-j),i).

n	a(n)
1	0
2	1
3	3
4	8
5	18
6	40
7	88
8	192
9	400
10	832
11	1728
12	3584
13	7424
14	15360
15	31744
16	65536
17	133120
18	270336
19	548864
20	1114112
21	2260992
22	4587520
23	9306112
24	18874368
25	38273024
26	77594624
27	157286400
28	318767104
29	645922816
30	1308622848
31	2650800128

[0, 1, 3, 8, 18, 40, 88, 192, 400, 832, 1728, 3584, 7424, 15360, 31744, 65536, 133120, 270336, 548864, 1114112, 2260992, 4587520, 9306112, 18874368, 38273024, 77594624, 157286400, 318767104, 645922816, 1308622848, 2650800128]

cp's OEIS Frontend

A080692 a(n)=(-1)^(n+1)*det(M(n)) where M(n) is the n X n matrix M(i,j)=min(abs(i-j),i).

Table of values

List of values