A268420 - cp's OEIS frontend

A268420 Number of nX2 0..3 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

n	a(n)
1	2
2	15
3	187
4	2530
5	34195
6	448667
7	5720450
8	71224847
9	869969995
10	10461568690
11	124193817155
12	1458609678443
13	16976365857602
14	196066210076847
15	2249518678962747
16	25662410911209090
17	291308117338854611

[2, 15, 187, 2530, 34195, 448667, 5720450, 71224847, 869969995, 10461568690, 124193817155, 1458609678443, 16976365857602, 196066210076847, 2249518678962747, 25662410911209090, 291308117338854611]

cp's OEIS Frontend

A268420 Number of nX2 0..3 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

List of values