A323968 - cp's OEIS frontend

A323968 Number of 4 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{4,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.

n	a(n)
0	1
1	3
2	16
3	94
4	386
5	1247
6	3423
7	8342
8	18546
9	38304
10	74451
11	137503
12	243103
13	413858
14	681632
15	1090365
16	1699493
17	2588049
18	3859530
19	5647620
20	8122864
21	11500393
22	16048805
23	22100312
24	30062268
25	40430198
26	53802453
27	70896621
28	92567829
29	119829076
30	153873742
31	196100423

[1, 3, 16, 94, 386, 1247, 3423, 8342, 18546, 38304, 74451, 137503, 243103, 413858, 681632, 1090365, 1699493, 2588049, 3859530, 5647620, 8122864, 11500393, 16048805, 22100312, 30062268, 40430198, 53802453, 70896621, 92567829, 119829076, 153873742, 196100423]

cp's OEIS Frontend

A323968 Number of 4 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{4,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.

Table of values

List of values