A138849 - cp's OEIS frontend

A138849 a(n) = AlexanderPolynomial[n] defined as Det[Transpose[S]-n S] where S is Kronecker Product of two 2 X 2 Seifert matrices {{-1, 1}, {0, -1}} [X] {{-1, 1}, {0, -1}} = {{1, -1, -1, 1}, {0, 1, 0, -1}, {0, 0, 1, -1}, {0, 0, 0, 1}}.

n	a(n)
1	1
2	0
3	7
4	52
5	189
6	496
7	1075
8	2052
9	3577
10	5824
11	8991
12	13300
13	18997
14	26352
15	35659
16	47236
17	61425
18	78592
19	99127
20	123444
21	151981
22	185200
23	223587
24	267652
25	317929
26	374976
27	439375
28	511732
29	592677
30	682864
31	782971
32	893700
33	1015777
34	1149952
35	1296999
36	1457716
37	1632925

[1, 0, 7, 52, 189, 496, 1075, 2052, 3577, 5824, 8991, 13300, 18997, 26352, 35659, 47236, 61425, 78592, 99127, 123444, 151981, 185200, 223587, 267652, 317929, 374976, 439375, 511732, 592677, 682864, 782971, 893700, 1015777, 1149952, 1296999, 1457716, 1632925]

cp's OEIS Frontend

A138849 a(n) = AlexanderPolynomial[n] defined as Det[Transpose[S]-n S] where S is Kronecker Product of two 2 X 2 Seifert matrices {{-1, 1}, {0, -1}} [X] {{-1, 1}, {0, -1}} = {{1, -1, -1, 1}, {0, 1, 0, -1}, {0, 0, 1, -1}, {0, 0, 0, 1}}.

Table of values

List of values