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.

A198524 Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.

Table of values

n a(n)
1 15
2 3660
3 1877316
4 1084539825
5 634586561196
6 371815743708461
7 217885196778717007
8 127683385189755792564
9 74824145653256981522691
10 43847942678019724723096730
11 25695476991145191912238756667

List of values

[15, 3660, 1877316, 1084539825, 634586561196, 371815743708461, 217885196778717007, 127683385189755792564, 74824145653256981522691, 43847942678019724723096730, 25695476991145191912238756667]

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

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