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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.

A213780 Antidiagonal sums of the convolution array A213778.

Table of values

n a(n)
1 1
2 6
3 17
4 40
5 78
6 140
7 230
8 360
9 535
10 770
11 1071
12 1456
13 1932
14 2520
15 3228
16 4080
17 5085
18 6270
19 7645
20 9240
21 11066
22 13156
23 15522
24 18200
25 21203
26 24570
27 28315
28 32480
29 37080
30 42160
31 47736
32 53856
33 60537
34 67830
35 75753
36 84360
37 93670
38 103740
39 114590

List of values

[1, 6, 17, 40, 78, 140, 230, 360, 535, 770, 1071, 1456, 1932, 2520, 3228, 4080, 5085, 6270, 7645, 9240, 11066, 13156, 15522, 18200, 21203, 24570, 28315, 32480, 37080, 42160, 47736, 53856, 60537, 67830, 75753, 84360, 93670, 103740, 114590]

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

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