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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.

A046161 a(n) = denominator of binomial(2n,n)/4^n.

Table of values

n a(n)
0 1
1 2
2 8
3 16
4 128
5 256
6 1024
7 2048
8 32768
9 65536
10 262144
11 524288
12 4194304
13 8388608
14 33554432
15 67108864
16 2147483648
17 4294967296
18 17179869184
19 34359738368
20 274877906944
21 549755813888
22 2199023255552
23 4398046511104
24 70368744177664
25 140737488355328
26 562949953421312

List of values

[1, 2, 8, 16, 128, 256, 1024, 2048, 32768, 65536, 262144, 524288, 4194304, 8388608, 33554432, 67108864, 2147483648, 4294967296, 17179869184, 34359738368, 274877906944, 549755813888, 2199023255552, 4398046511104, 70368744177664, 140737488355328, 562949953421312]

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

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