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A162131
Number of n X n symmetric 0..6 arrays with rows, considered as 7-ary numbers, in strictly increasing order
1
7, 168, 20664, 13420008, 48646451448, 1026088816521384, 129626970213767748408, 100146990341371129870445928, 480706456216438726881369732950904, 14515325887679952129833652850645598932008
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A165388 A124126 A086373 * A258299 A012067 A012145
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved