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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.

A130785 Sequence identical to its third differences: a(n+3) = 3a(n+2)-3a(n+1)+2a(n), with a(0)=1, a(1)=4, a(2)=9.

Table of values

n a(n)
0 1
1 4
2 9
3 17
4 32
5 63
6 127
7 256
8 513
9 1025
10 2048
11 4095
12 8191
13 16384
14 32769
15 65537
16 131072
17 262143
18 524287
19 1048576
20 2097153
21 4194305
22 8388608
23 16777215
24 33554431
25 67108864
26 134217729
27 268435457
28 536870912
29 1073741823
30 2147483647
31 4294967296
32 8589934593

List of values

[1, 4, 9, 17, 32, 63, 127, 256, 513, 1025, 2048, 4095, 8191, 16384, 32769, 65537, 131072, 262143, 524287, 1048576, 2097153, 4194305, 8388608, 16777215, 33554431, 67108864, 134217729, 268435457, 536870912, 1073741823, 2147483647, 4294967296, 8589934593]

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

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