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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.

A047111 Sum{T(i,n-i): i=0,1,...,n}, array T as in A047110.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 10
5 20
6 40
7 71
8 142
9 260
10 520
11 1040
12 1936
13 3872
14 7330
15 14660
16 29320
17 55874
18 111748
19 215252
20 430504
21 861008
22 1663662
23 3327324
24 6476960
25 12953920
26 25907840
27 50511295
28 101022590
29 198016168
30 396032336
31 792064672
32 1553798279

List of values

[1, 2, 3, 6, 10, 20, 40, 71, 142, 260, 520, 1040, 1936, 3872, 7330, 14660, 29320, 55874, 111748, 215252, 430504, 861008, 1663662, 3327324, 6476960, 12953920, 25907840, 50511295, 101022590, 198016168, 396032336, 792064672, 1553798279]

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

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