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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.

A123808 Number of ways to build a contiguous building with n LEGO blocks of size 1 X 7 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.

Table of values

n a(n)
1 13
2 190
3 3289
4 59970
5 1154985
6 22797643
7 461266481
8 9477047041

List of values

[13, 190, 3289, 59970, 1154985, 22797643, 461266481, 9477047041]

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

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