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.

A224547 Number of (n+1) X 6 0..1 matrices with each 2 X 2 subblock idempotent.

Table of values

n a(n)
1 80
2 137
3 193
4 294
5 428
6 635
7 943
8 1420
9 2162
10 3333
11 5193
12 8166
13 12936
14 20611
15 32983
16 52952
17 85210
18 137349
19 221653
20 357998
21 578544
22 935327
23 1512543
24 2446424
25 3957398
26 6402125
27 10357693
28 16757850
29 27113432
30 43869023
31 70980043
32 114846496

List of values

[80, 137, 193, 294, 428, 635, 943, 1420, 2162, 3333, 5193, 8166, 12936, 20611, 32983, 52952, 85210, 137349, 221653, 357998, 578544, 935327, 1512543, 2446424, 3957398, 6402125, 10357693, 16757850, 27113432, 43869023, 70980043, 114846496]