A214541 - cp's OEIS frontend

A214541 Number of 3X3X3 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value.

n	a(n)
1	2
2	15
3	38
4	79
5	152
6	263
7	418
8	643
9	942
10	1329
11	1832
12	2463
13	3234
14	4185
15	5326
16	6677
17	8280
18	10153
19	12314
20	14817
21	17678
22	20923
23	24608
24	28757
25	33394
26	38587
27	44358
28	50739
29	57800
30	65571
31	74082
32	83415
33	93598
34	104669
35	116712
36	129763
37	143858
38	159093
39	175502

[2, 15, 38, 79, 152, 263, 418, 643, 942, 1329, 1832, 2463, 3234, 4185, 5326, 6677, 8280, 10153, 12314, 14817, 17678, 20923, 24608, 28757, 33394, 38587, 44358, 50739, 57800, 65571, 74082, 83415, 93598, 104669, 116712, 129763, 143858, 159093, 175502]

cp's OEIS Frontend

A214541 Number of 3X3X3 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value.

Table of values

List of values