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.

A187460 Number of (n+1)X(n+1) 0..3 arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.

Table of values

n a(n)
1 192
2 13726
3 5098224
4 3387715318
5 19708386669940
6 150657364854061134

List of values

[192, 13726, 5098224, 3387715318, 19708386669940, 150657364854061134]

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

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