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.

A178643 Square array read by antidiagonals. Convolution of a(n) = 2*a(n-1) - a(n-2) and 10^n.

Table of values

n a(n)
1 1
2 10
3 2
4 100
5 19
6 4
7 1000
8 190
9 36
10 8
11 10000
12 1900
13 361
14 68
15 16
16 100000
17 19000
18 3610
19 686
20 128
21 32
22 1000000
23 190000
24 36100
25 6859
26 1304
27 240
28 64
29 10000000
30 1900000
31 361000
32 68590
33 13032
34 2480
35 448
36 128
37 100000000
38 19000000
39 3610000
40 685900
41 130321
42 24760
43 4720
44 832
45 256

List of values

[1, 10, 2, 100, 19, 4, 1000, 190, 36, 8, 10000, 1900, 361, 68, 16, 100000, 19000, 3610, 686, 128, 32, 1000000, 190000, 36100, 6859, 1304, 240, 64, 10000000, 1900000, 361000, 68590, 13032, 2480, 448, 128, 100000000, 19000000, 3610000, 685900, 130321, 24760, 4720, 832, 256]