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.

A239153 Number of (n+1)X(4+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order.

Table of values

n a(n)
1 24
2 24
3 12159
4 135766
5 12844591
6 330311070
7 18120156500
8 629468400383
9 28646802159654
10 1108832844851022
11 47257467282260746
12 1901383445656471050
13 79172996011297669608
14 3229805113653824580575
15 133380680053667604594194

List of values

[24, 24, 12159, 135766, 12844591, 330311070, 18120156500, 629468400383, 28646802159654, 1108832844851022, 47257467282260746, 1901383445656471050, 79172996011297669608, 3229805113653824580575, 133380680053667604594194]