A194772 - cp's OEIS frontend

A194772 Number of lower triangles of an (n+2) X (n+2) 0..2 array with new values introduced in row major order 0..2 and no element unequal to more than one horizontal or vertical neighbor.

n	a(n)
1	7
2	17
3	41
4	95
5	219
6	493
7	1101
8	2427
9	5311
10	11529
11	24881
12	53399
13	114083
14	242725
15	514581
16	1087411
17	2291335
18	4815681
19	10097401
20	21126863
21	44117867
22	91963997
23	191384541
24	397682155
25	825190479
26	1710033273
27	3539371201
28	7317351687

[7, 17, 41, 95, 219, 493, 1101, 2427, 5311, 11529, 24881, 53399, 114083, 242725, 514581, 1087411, 2291335, 4815681, 10097401, 21126863, 44117867, 91963997, 191384541, 397682155, 825190479, 1710033273, 3539371201, 7317351687]

cp's OEIS Frontend

A194772 Number of lower triangles of an (n+2) X (n+2) 0..2 array with new values introduced in row major order 0..2 and no element unequal to more than one horizontal or vertical neighbor.

Table of values

List of values