cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A267913 Number of 2 X n 0..2 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

n a(n)
1 2
2 14
3 96
4 726
5 5046
6 35574
7 242406
8 1653750
9 11113926
10 74553750
11 496532454
12 3300259254
13 21854907654
14 144501754326
15 953526151206
16 6285325782006
17 41384363469126
18 272296902013974
19 1790471038255206
20 11767947840324150

List of values

[2, 14, 96, 726, 5046, 35574, 242406, 1653750, 11113926, 74553750, 496532454, 3300259254, 21854907654, 144501754326, 953526151206, 6285325782006, 41384363469126, 272296902013974, 1790471038255206, 11767947840324150]