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.

A204628 Number of (n+1)X7 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 393216
2 425257068
3 459972403614
4 497525810748759
5 538145459458960020
6 582081449451902347866
7 629604521519860258105194
8 681007535879068229405338152
9 736607263887839663637635211744

List of values

[393216, 425257068, 459972403614, 497525810748759, 538145459458960020, 582081449451902347866, 629604521519860258105194, 681007535879068229405338152, 736607263887839663637635211744]

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

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