A115246 - cp's OEIS frontend

A115246 Number of different ways to select n elements from three sets of n elements such that there is at least one element from each set.

n	a(n)
1	0
2	0
3	27
4	288
5	2250
6	15795
7	105987
8	696864
9	4540968
10	29490750
11	191420427
12	1243565235
13	8091223647
14	52739879283
15	344402073027
16	2253045672480
17	14764068268068
18	96899123172708
19	636877933530303
20	4191430966219038
21	27617820628739718
22	182176855684869243

[0, 0, 27, 288, 2250, 15795, 105987, 696864, 4540968, 29490750, 191420427, 1243565235, 8091223647, 52739879283, 344402073027, 2253045672480, 14764068268068, 96899123172708, 636877933530303, 4191430966219038, 27617820628739718, 182176855684869243]

cp's OEIS Frontend

A115246 Number of different ways to select n elements from three sets of n elements such that there is at least one element from each set.

Table of values

List of values