cp's OEIS Frontend

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.

A292689 Decimal values of the antidiagonals of the Sierpinski carpet considered as binary numbers.

Table of values

n a(n)
1 1
2 3
3 5
4 15
5 31
6 45
7 119
8 231
9 325
10 975
11 2015
12 2925
13 8191
14 16383
15 23405
16 61431
17 118759
18 166725
19 499151
20 1030623
21 1495405
22 4186623
23 8372735
24 11960685
25 31392247
26 60686823
27 85197125
28 255591375
29 528222175
30 766774125
31 2147229695
32 4294721535
33 6135503725
34 16103829495
35 31132078055

List of values

[1, 3, 5, 15, 31, 45, 119, 231, 325, 975, 2015, 2925, 8191, 16383, 23405, 61431, 118759, 166725, 499151, 1030623, 1495405, 4186623, 8372735, 11960685, 31392247, 60686823, 85197125, 255591375, 528222175, 766774125, 2147229695, 4294721535, 6135503725, 16103829495, 31132078055]

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

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