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.

A209103 Number of 4 X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 14
2 612
3 23248
4 849548
5 30836932
6 1118366188
7 40556341276
8 1470727552508
9 53334292149524
10 1934110124219172
11 70138417396144324
12 2543494195954824748
13 92237079873229771996
14 3344878451059254299004
15 121298417878736991992724

List of values

[14, 612, 23248, 849548, 30836932, 1118366188, 40556341276, 1470727552508, 53334292149524, 1934110124219172, 70138417396144324, 2543494195954824748, 92237079873229771996, 3344878451059254299004, 121298417878736991992724]

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

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