A328713 - cp's OEIS frontend

A328713 Constant term in the expansion of (1 + x + y + z + 1/x + 1/y + 1/z)^n.

n	a(n)
0	1
1	1
2	7
3	19
4	127
5	511
6	3301
7	16297
8	103279
9	570367
10	3595177
11	21167917
12	133789789
13	818625133
14	5207248879
15	32649752779
16	209258291599
17	1333828204303
18	8612806088761
19	55546469634733
20	361143420408337
21	2349709451702737
22	15370341546766939
23	100695951740818903
24	662213750028892429

[1, 1, 7, 19, 127, 511, 3301, 16297, 103279, 570367, 3595177, 21167917, 133789789, 818625133, 5207248879, 32649752779, 209258291599, 1333828204303, 8612806088761, 55546469634733, 361143420408337, 2349709451702737, 15370341546766939, 100695951740818903, 662213750028892429]

cp's OEIS Frontend

A328713 Constant term in the expansion of (1 + x + y + z + 1/x + 1/y + 1/z)^n.

Table of values

List of values