A375219 - cp's OEIS frontend

A375219 T(n,k) is the number of permutations of the multiset {1, 1, 1, 2, 2, 2, ..., n, n, n} with k occurrences of fixed triples (j,j,j), where T(n,k), n >= 2, 0 <= k <= n-2 is a triangle read by rows.

n	a(n)
2	19
3	1622
4	57
5	362997
6	6488
7	114
8	166336604
9	1814985
10	16220
11	190
12	136221590695
13	998019624
14	5444955
15	32440
16	285
17	181552310074386
18	953551134865
19	3493068684
20	12704895
21	56770
22	399
23	367942716863474473
24	1452418480595088
25	3814204539460
26	9314849824
27	25409790
28	90832
29	532

[19, 1622, 57, 362997, 6488, 114, 166336604, 1814985, 16220, 190, 136221590695, 998019624, 5444955, 32440, 285, 181552310074386, 953551134865, 3493068684, 12704895, 56770, 399, 367942716863474473, 1452418480595088, 3814204539460, 9314849824, 25409790, 90832, 532]

cp's OEIS Frontend

A375219 T(n,k) is the number of permutations of the multiset {1, 1, 1, 2, 2, 2, ..., n, n, n} with k occurrences of fixed triples (j,j,j), where T(n,k), n >= 2, 0 <= k <= n-2 is a triangle read by rows.

Table of values

List of values