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A179810
Number of n X 5 arrays with every diagonal and antidiagonal of length L containing a permutation of 1..L.
1
0, 1, 64, 625, 9792, 68121, 596160, 3690241, 23378880, 178623225, 1443811264, 11457775681, 91853884864, 704614184569, 5394132739008, 41233671609025, 315282132304320, 2433976660951801, 18833511341758400, 145456660853820481
OFFSET
5,3
LINKS
EXAMPLE
Some solutions for 7 X 5:
.1.2.1.2.1...1.1.1.2.1...1.1.1.2.1...1.2.1.2.1...1.1.1.1.1...1.1.1.2.1...1.1.1.2.1
.1.3.1.3.1...2.3.3.2.1...2.3.4.3.1...1.2.1.3.1...2.3.2.2.2...2.2.3.2.1...2.2.4.3.1
.2.3.5.4.2...2.4.5.4.3...2.3.4.3.2...3.3.4.4.2...2.3.5.4.3...3.4.4.4.3...3.3.5.3.2
.4.4.5.4.3...1.4.5.4.2...1.5.5.5.2...4.5.5.5.3...4.4.5.4.3...1.5.5.5.2...1.4.5.4.2
.2.3.5.4.2...3.3.5.3.2...2.4.4.4.2...2.3.4.4.3...3.3.5.4.2...3.3.4.3.3...2.4.5.4.3
.2.3.2.3.2...2.2.4.3.1...2.3.3.3.1...2.3.2.2.2...1.2.1.3.1...2.2.4.2.1...2.3.3.2.1
.1.1.1.1.1...1.1.1.2.1...1.1.1.2.1...1.1.1.1.1...1.2.1.2.1...1.1.1.2.1...1.1.1.2.1
CROSSREFS
Sequence in context: A045789 A000525 A067476 * A303265 A138332 A091083
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 28 2010
STATUS
approved