A087929 Number of ways of arranging the numbers 1 ... 8n into an 8 X n array so there is exactly one local maximum.
128, 1929117696, 1370418864769445888, 5359457796069778002771306240
Offset: 1
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.