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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.

A237573 Number of (n+1)X(5+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Table of values

n a(n)
1 769680
2 54395184
3 4093774632
4 313460630304
5 23898935623162
6 1807232491974520
7 138024943528283880
8 10448941120238123892
9 797725060871305356158
10 60393893110722967036808
11 4610831174869673938780096

List of values

[769680, 54395184, 4093774632, 313460630304, 23898935623162, 1807232491974520, 138024943528283880, 10448941120238123892, 797725060871305356158, 60393893110722967036808, 4610831174869673938780096]

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

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