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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.

A117260 Triangle T, read by rows, where matrix inverse T^-1 has -2^n in the secondary diagonal: [T^-1](n+1,n) = -2^n, with all 1's in the main diagonal and zeros elsewhere.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 2
5 1
6 8
7 8
8 4
9 1
10 64
11 64
12 32
13 8
14 1
15 1024
16 1024
17 512
18 128
19 16
20 1
21 32768
22 32768
23 16384
24 4096
25 512
26 32
27 1
28 2097152
29 2097152
30 1048576
31 262144
32 32768
33 2048
34 64
35 1
36 268435456
37 268435456
38 134217728
39 33554432
40 4194304
41 262144
42 8192
43 128
44 1

List of values

[1, 1, 1, 2, 2, 1, 8, 8, 4, 1, 64, 64, 32, 8, 1, 1024, 1024, 512, 128, 16, 1, 32768, 32768, 16384, 4096, 512, 32, 1, 2097152, 2097152, 1048576, 262144, 32768, 2048, 64, 1, 268435456, 268435456, 134217728, 33554432, 4194304, 262144, 8192, 128, 1]