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.

A223671 Number of 4Xn 0..1 arrays with rows, diagonals and antidiagonals unimodal.

Table of values

n a(n)
1 16
2 256
3 1723
4 6454
5 18980
6 49561
7 119150
8 267643
9 567197
10 1142224
11 2198273
12 4062420
13 7238132
14 12477929
15 20877528
16 33995513
17 54002935
18 83867606
19 127578211
20 190413722
21 279263958
22 403007495
23 572953490
24 803354343
25 1111996481
26 1520876908

List of values

[16, 256, 1723, 6454, 18980, 49561, 119150, 267643, 567197, 1142224, 2198273, 4062420, 7238132, 12477929, 20877528, 33995513, 54002935, 83867606, 127578211, 190413722, 279263958, 403007495, 572953490, 803354343, 1111996481, 1520876908]