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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.

A006261 a(n) = Sum_{k=0..5} binomial(n,k).

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 16
5 32
6 63
7 120
8 219
9 382
10 638
11 1024
12 1586
13 2380
14 3473
15 4944
16 6885
17 9402
18 12616
19 16664
20 21700
21 27896
22 35443
23 44552
24 55455
25 68406
26 83682
27 101584
28 122438
29 146596
30 174437
31 206368
32 242825
33 284274
34 331212
35 384168
36 443704
37 510416
38 584935
39 667928
40 760099
41 862190

List of values

[1, 2, 4, 8, 16, 32, 63, 120, 219, 382, 638, 1024, 1586, 2380, 3473, 4944, 6885, 9402, 12616, 16664, 21700, 27896, 35443, 44552, 55455, 68406, 83682, 101584, 122438, 146596, 174437, 206368, 242825, 284274, 331212, 384168, 443704, 510416, 584935, 667928, 760099, 862190]

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

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