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.

A184880 Diagonal sums of number triangle A184879.

Table of values

n a(n)
0 1
1 1
2 2
3 -1
4 1
5 4
6 21
7 33
8 30
9 19
10 33
11 240
12 537
13 961
14 922
15 1223
16 2753
17 8380
18 17725
19 27873
20 37494
21 57627
22 132577
23 300648
24 589953
25 942465
26 1460146
27 2566159
28 5351297
29 11014388
30 20304613
31 34080673
32 57005646
33 105116835
34 207381921
35 402618208
36 728728425
37 1262355777
38 2218248522
39 4121995735
40 7892039233

List of values

[1, 1, 2, -1, 1, 4, 21, 33, 30, 19, 33, 240, 537, 961, 922, 1223, 2753, 8380, 17725, 27873, 37494, 57627, 132577, 300648, 589953, 942465, 1460146, 2566159, 5351297, 11014388, 20304613, 34080673, 57005646, 105116835, 207381921, 402618208, 728728425, 1262355777, 2218248522, 4121995735, 7892039233]

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

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