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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.

A213850 Antidiagonal sums of the convolution array A213849.

Table of values

n a(n)
1 1
2 3
3 10
4 20
5 42
6 70
7 120
8 180
9 275
10 385
11 546
12 728
13 980
14 1260
15 1632
16 2040
17 2565
18 3135
19 3850
20 4620
21 5566
22 6578
23 7800
24 9100
25 10647
26 12285
27 14210
28 16240
29 18600
30 21080
31 23936
32 26928
33 30345
34 33915
35 37962
36 42180
37 46930

List of values

[1, 3, 10, 20, 42, 70, 120, 180, 275, 385, 546, 728, 980, 1260, 1632, 2040, 2565, 3135, 3850, 4620, 5566, 6578, 7800, 9100, 10647, 12285, 14210, 16240, 18600, 21080, 23936, 26928, 30345, 33915, 37962, 42180, 46930]

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

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