A351585 - cp's OEIS frontend

A351585 Triangle read by rows: T(n,k) = A(k,n-k), 1 <= k < n, 2 <= n, where A(m,n) is the number of distinct strings consisting of one X, m+n-1 Y's and m+n-1 Z's in which the X lies to the right of at least m Y's and at least m Z's.

n	a(n)
2	2
3	16
4	6
5	90
6	52
7	20
8	448
9	306
10	180
11	70
12	2100
13	1568
14	1086
15	644
16	252
17	9504
18	7500
19	5664
20	3948
21	2352
22	924
23	42042
24	34452
25	27450
26	20840
27	14580
28	8712
29	3432
30	183040
31	154154
32	127380
33	101950
34	77640
35	54450
36	32604
37	12870
38	787644
39	677248
40	574574
41	476652
42	382510
43	291896
44	205062
45	122980
46	48620

[2, 16, 6, 90, 52, 20, 448, 306, 180, 70, 2100, 1568, 1086, 644, 252, 9504, 7500, 5664, 3948, 2352, 924, 42042, 34452, 27450, 20840, 14580, 8712, 3432, 183040, 154154, 127380, 101950, 77640, 54450, 32604, 12870, 787644, 677248, 574574, 476652, 382510, 291896, 205062, 122980, 48620]

cp's OEIS Frontend

A351585 Triangle read by rows: T(n,k) = A(k,n-k), 1 <= k < n, 2 <= n, where A(m,n) is the number of distinct strings consisting of one X, m+n-1 Y's and m+n-1 Z's in which the X lies to the right of at least m Y's and at least m Z's.

Table of values

List of values