A188237 - cp's OEIS frontend

A188237 Number of nondecreasing arrangements of 4 numbers in -(n+2)..(n+2) with sum zero and not more than two numbers equal.

n	a(n)
1	15
2	30
3	52
4	81
5	121
6	172
7	234
8	311
9	403
10	510
11	636
12	781
13	945
14	1132
15	1342
16	1575
17	1835
18	2122
19	2436
20	2781
21	3157
22	3564
23	4006
24	4483
25	4995
26	5546
27	6136
28	6765
29	7437
30	8152
31	8910
32	9715
33	10567
34	11466
35	12416
36	13417
37	14469
38	15576
39	16738
40	17955
41	19231
42	20566
43	21960

[15, 30, 52, 81, 121, 172, 234, 311, 403, 510, 636, 781, 945, 1132, 1342, 1575, 1835, 2122, 2436, 2781, 3157, 3564, 4006, 4483, 4995, 5546, 6136, 6765, 7437, 8152, 8910, 9715, 10567, 11466, 12416, 13417, 14469, 15576, 16738, 17955, 19231, 20566, 21960]

cp's OEIS Frontend

A188237 Number of nondecreasing arrangements of 4 numbers in -(n+2)..(n+2) with sum zero and not more than two numbers equal.

Table of values

List of values