A214385 - cp's OEIS frontend

A214385 Number of 3 X 3 X 3 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors.

n	a(n)
1	8
2	94
3	456
4	1506
5	3976
6	9044
7	18480
8	34812
9	61512
10	103202
11	165880
12	257166
13	386568
14	565768
15	808928
16	1133016
17	1558152
18	2107974
19	2810024
20	3696154
21	4802952
22	6172188
23	7851280
24	9893780
25	12359880
26	15316938
27	18840024
28	23012486
29	27926536
30	33683856

[8, 94, 456, 1506, 3976, 9044, 18480, 34812, 61512, 103202, 165880, 257166, 386568, 565768, 808928, 1133016, 1558152, 2107974, 2810024, 3696154, 4802952, 6172188, 7851280, 9893780, 12359880, 15316938, 18840024, 23012486, 27926536, 33683856]

cp's OEIS Frontend

A214385 Number of 3 X 3 X 3 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors.

Table of values

List of values