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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.

A378943 Numbers obtained from the tribonacci triangle formed by the number of connection points in the paths obtained by Pell walk on the square grid.

Table of values

n a(n)
1 2
2 3
3 7
4 13
5 25
6 46
7 86
8 158
9 292
10 537
11 989
12 1819
13 3347
14 6156
15 11324
16 20828
17 38310
18 70463
19 129603
20 238377
21 438445
22 806426
23 1483250
24 2728122
25 5017800
26 9229173
27 16975097
28 31222071
29 57426343
30 105623512
31 194271928
32 357321784
33 657217226
34 1208810939
35 2223349951
36 4089378117

List of values

[2, 3, 7, 13, 25, 46, 86, 158, 292, 537, 989, 1819, 3347, 6156, 11324, 20828, 38310, 70463, 129603, 238377, 438445, 806426, 1483250, 2728122, 5017800, 9229173, 16975097, 31222071, 57426343, 105623512, 194271928, 357321784, 657217226, 1208810939, 2223349951, 4089378117]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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