A087924 Number of ways of arranging the numbers 1 ... 3n into a 3 X n array so there is exactly one local maximum.

4, 208, 29568, 7452704, 2941306368, 1683453629440, 1323082429842432, 1370418864769445888, 1811764909105311267840, 2980039854936078219167744, 5972307516078119199647692800

Offset: 1

Author

R. H. Hardin, Oct 27 2003

Keywords

• nonn

Crossrefs

A row of the array in A087783. Cf. A007846.