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.

A355565 T(j,k) are the numerators s in the representation R = s/t + (2/Pi)*u/v of the resistance between two nodes separated by the distance vector (j,k) in an infinite square lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= j, is a triangle read by rows.

Table of values

n a(n)
0 0
1 1
2 0
3 2
4 -1
5 0
6 17
7 -4
8 1
9 0
10 40
11 -49
12 6
13 -1
14 0
15 401
16 -140
17 97
18 -8
19 1
20 0
21 1042
22 -1569
23 336
24 -161
25 10
26 -1
27 0
28 11073
29 -4376
30 4321
31 -660
32 241
33 -12
34 1
35 0
36 29856
37 -48833
38 13342
39 -9681
40 1144
41 -337
42 14
43 -1
44 0
45 325441
46 -136488
47 160929
48 -33188
49 18929
50 -1820
51 449
52 -16
53 1
54 0

List of values

[0, 1, 0, 2, -1, 0, 17, -4, 1, 0, 40, -49, 6, -1, 0, 401, -140, 97, -8, 1, 0, 1042, -1569, 336, -161, 10, -1, 0, 11073, -4376, 4321, -660, 241, -12, 1, 0, 29856, -48833, 13342, -9681, 1144, -337, 14, -1, 0, 325441, -136488, 160929, -33188, 18929, -1820, 449, -16, 1, 0]