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.

A233241 Number of 3Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

Table of values

n a(n)
1 11
2 313
3 18744
4 1212549
5 79794804
6 5267525102
7 347931872810
8 22984197561232
9 1518355064369787
10 100304170431867107
11 6626206197404526693
12 437734684222631005909
13 28917249596515421269798
14 1910306307000347264023968

List of values

[11, 313, 18744, 1212549, 79794804, 5267525102, 347931872810, 22984197561232, 1518355064369787, 100304170431867107, 6626206197404526693, 437734684222631005909, 28917249596515421269798, 1910306307000347264023968]

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

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