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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.

A354463 a(n) is the number of trailing zeros in (2^n)!.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 3
5 7
6 14
7 31
8 63
9 126
10 253
11 509
12 1021
13 2045
14 4094
15 8189
16 16380
17 32763
18 65531
19 131067
20 262140
21 524285
22 1048571
23 2097146
24 4194297
25 8388603
26 16777208
27 33554424
28 67108858
29 134217720
30 268435446
31 536870902
32 1073741816
33 2147483642
34 4294967289
35 8589934584
36 17179869176
37 34359738358
38 68719476729

List of values

[0, 0, 0, 1, 3, 7, 14, 31, 63, 126, 253, 509, 1021, 2045, 4094, 8189, 16380, 32763, 65531, 131067, 262140, 524285, 1048571, 2097146, 4194297, 8388603, 16777208, 33554424, 67108858, 134217720, 268435446, 536870902, 1073741816, 2147483642, 4294967289, 8589934584, 17179869176, 34359738358, 68719476729]

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

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