A054026 - cp's OEIS frontend

A054026 a(n) is the number of sets of natural numbers [a,b,c,d,e] that can be produced with the numbers [0..n] such that the values of all the distinct parenthesized expressions of a-b-c-d-e are different.

n	a(n)
0	0
1	0
2	0
3	0
4	300
5	1296
6	4116
7	9984
8	21384
9	40800
10	72600
11	120960
12	192660
13	294000
14	434700
15	623616
16	873936
17	1197504
18	1611504
19	2131200
20	2778300
21	3571920
22	4538820
23	5702400
24	7095000
25	8744736
26	10690056
27	12964224
28	15612324
29	18673200
30	22199100
31	26234880
32	30840480
33	36067200
34	41983200
35	48646656
36	56134476

[0, 0, 0, 0, 300, 1296, 4116, 9984, 21384, 40800, 72600, 120960, 192660, 294000, 434700, 623616, 873936, 1197504, 1611504, 2131200, 2778300, 3571920, 4538820, 5702400, 7095000, 8744736, 10690056, 12964224, 15612324, 18673200, 22199100, 26234880, 30840480, 36067200, 41983200, 48646656, 56134476]

cp's OEIS Frontend

A054026 a(n) is the number of sets of natural numbers [a,b,c,d,e] that can be produced with the numbers [0..n] such that the values of all the distinct parenthesized expressions of a-b-c-d-e are different.

Table of values

List of values