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.

A107597 Antidiagonal sums of triangle A107105: a(n) = Sum_{k=0..n} A107105(n-k,k), where A107105(n,k) = C(n,k)*(C(n,k) + 1)/2.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 8
5 17
6 38
7 87
8 205
9 493
10 1203
11 2969
12 7389
13 18504
14 46561
15 117596
16 297883
17 756388
18 1924484
19 4904830
20 12519121
21 31995286
22 81864992
23 209681349
24 537562018
25 1379332297
26 3542013533
27 9102191107
28 23406301490
29 60226845008
30 155059899921

List of values

[1, 1, 2, 4, 8, 17, 38, 87, 205, 493, 1203, 2969, 7389, 18504, 46561, 117596, 297883, 756388, 1924484, 4904830, 12519121, 31995286, 81864992, 209681349, 537562018, 1379332297, 3542013533, 9102191107, 23406301490, 60226845008, 155059899921]

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

Content is available under The OEIS End-User License Agreement.