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.

A115391 a(0)=0; then a(4*k+1)=a(4*k)+(4*k+1)^2, a(4*k+2)=a(4*k+1)+(4*k+3)^2, a(4*k+3)=a(4*k+2)+(4*k+2)^2, a(4*k+4)=a(4*k+3)+(4*k+4)^2.

Table of values

n a(n)
0 0
1 1
2 10
3 14
4 30
5 55
6 104
7 140
8 204
9 285
10 406
11 506
12 650
13 819
14 1044
15 1240
16 1496
17 1785
18 2146
19 2470
20 2870
21 3311
22 3840
23 4324
24 4900
25 5525
26 6254
27 6930
28 7714
29 8555
30 9516
31 10416
32 11440
33 12529
34 13754
35 14910
36 16206
37 17575
38 19096
39 20540
40 22140
41 23821
42 25670
43 27434
44 29370

List of values

[0, 1, 10, 14, 30, 55, 104, 140, 204, 285, 406, 506, 650, 819, 1044, 1240, 1496, 1785, 2146, 2470, 2870, 3311, 3840, 4324, 4900, 5525, 6254, 6930, 7714, 8555, 9516, 10416, 11440, 12529, 13754, 14910, 16206, 17575, 19096, 20540, 22140, 23821, 25670, 27434, 29370]

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

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