A211906 - cp's OEIS frontend

A211906 Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-3.

n	a(n)
1	0
2	2
3	30
4	418
5	3006
6	14201
7	51157
8	152650
9	396538
10	926011
11	1987151
12	3980637
13	7530745
14	13575108
15	23479016
16	39178351
17	63355567
18	99653440
19	152931628
20	229571396
21	337834176
22	488279947
23	694251735

[0, 2, 30, 418, 3006, 14201, 51157, 152650, 396538, 926011, 1987151, 3980637, 7530745, 13575108, 23479016, 39178351, 63355567, 99653440, 152931628, 229571396, 337834176, 488279947, 694251735]

cp's OEIS Frontend

A211906 Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-3.

Table of values

List of values