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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.

A123800 Number of ways to build a contiguous building with n LEGO blocks of size 1 X 6 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 11
2 136
3 1991
4 30701
5 500038
6 8346595
7 142812582
8 2481290457
9 43703296703

List of values

[11, 136, 1991, 30701, 500038, 8346595, 142812582, 2481290457, 43703296703]

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

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