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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.

A173125 a(n) = Sum_{k == floor(n/2) (mod 5)} C(n,k).

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 6
5 10
6 20
7 35
8 70
9 127
10 254
11 474
12 948
13 1807
14 3614
15 6995
16 13990
17 27370
18 54740
19 107883
20 215766
21 427351
22 854702
23 1698458
24 3396916
25 6765175
26 13530350
27 26985675
28 53971350
29 107746282
30 215492564
31 430470899
32 860941798
33 1720537327
34 3441074654

List of values

[1, 1, 2, 3, 6, 10, 20, 35, 70, 127, 254, 474, 948, 1807, 3614, 6995, 13990, 27370, 54740, 107883, 215766, 427351, 854702, 1698458, 3396916, 6765175, 13530350, 26985675, 53971350, 107746282, 215492564, 430470899, 860941798, 1720537327, 3441074654]

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

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