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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.

A183319 Number of n X 7 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

Table of values

n a(n)
1 34
2 250
3 3305
4 31428
5 343035
6 3437801
7 35629548
8 360327392
9 3674032121
10 37171418048
11 376812203313
12 3809267878552
13 38525903428706
14 389213738128583
15 3932484616050161
16 39713438364928384
17 401069370226611064
18 4049515179562143177
19 40887644784074526836
20 412792720508937690701

List of values

[34, 250, 3305, 31428, 343035, 3437801, 35629548, 360327392, 3674032121, 37171418048, 376812203313, 3809267878552, 38525903428706, 389213738128583, 3932484616050161, 39713438364928384, 401069370226611064, 4049515179562143177, 40887644784074526836, 412792720508937690701]

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

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