A127509 - cp's OEIS frontend

A127509 Number of n-tuples where each entry is chosen from the subsets of {1,2,3} such that the intersection of all n entries contains exactly one element.

n	a(n)
1	3
2	27
3	147
4	675
5	2883
6	11907
7	48387
8	195075
9	783363
10	3139587
11	12570627
12	50307075
13	201277443
14	805208067
15	3221028867
16	12884508675
17	51538821123
18	206156857347
19	824630575107
20	3298528591875
21	13194126950403
22	52776532967427

[3, 27, 147, 675, 2883, 11907, 48387, 195075, 783363, 3139587, 12570627, 50307075, 201277443, 805208067, 3221028867, 12884508675, 51538821123, 206156857347, 824630575107, 3298528591875, 13194126950403, 52776532967427]

cp's OEIS Frontend

A127509 Number of n-tuples where each entry is chosen from the subsets of {1,2,3} such that the intersection of all n entries contains exactly one element.

Table of values

List of values