A002908 - cp's OEIS frontend

A002908 High temperature expansion of -u/J in odd powers of v = tanh(J/kT), where u is energy per site of the spin-1/2 Ising model on square lattice with nearest-neighbor interaction J at temperature T.

n	a(n)
1	2
2	4
3	8
4	24
5	84
6	328
7	1372
8	6024
9	27412
10	128228
11	613160
12	2985116
13	14751592
14	73825416
15	373488764
16	1907334616
17	9820757380
18	50934592820
19	265877371160
20	1395907472968
21	7366966846564
22	39062802311672
23	208015460898924
24	1112050252939612
25	5966352507546872

[2, 4, 8, 24, 84, 328, 1372, 6024, 27412, 128228, 613160, 2985116, 14751592, 73825416, 373488764, 1907334616, 9820757380, 50934592820, 265877371160, 1395907472968, 7366966846564, 39062802311672, 208015460898924, 1112050252939612, 5966352507546872]

cp's OEIS Frontend

A002908 High temperature expansion of -u/J in odd powers of v = tanh(J/kT), where u is energy per site of the spin-1/2 Ising model on square lattice with nearest-neighbor interaction J at temperature T.

Table of values

List of values