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A226003 Number of pairs of orthogonal (-5,7) vectors of length 12*n. 1
63360, 4403255070720, 50389229527931289600, 691039017279131756475187200, 11230803011407677754405600949698560, 162663217362852128754854119225357687062528 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 17 of A225987.
LINKS
EXAMPLE
Some solutions for n=1
..7..7....7..7...-5.-5...-5..7...-5..7...-5..7...-5..7...-5.-5...-5..7....7..7
.-5..7...-5..7...-5.-5....7..7....7.-5....7..7....7..7...-5.-5....7..7....7..7
.-5..7....7.-5...-5..7....7..7....7.-5....7..7...-5..7...-5.-5....7.-5...-5..7
.-5..7....7..7...-5.-5....7.-5...-5.-5....7.-5...-5..7...-5.-5....7..7....7.-5
.-5..7....7.-5...-5.-5...-5..7...-5..7...-5..7....7..7...-5..7...-5..7....7..7
..7.-5....7..7....7.-5...-5..7...-5.-5...-5..7...-5..7...-5..7....7..7...-5..7
..7..7....7..7....7.-5....7..7...-5.-5...-5..7...-5..7...-5.-5....7.-5....7.-5
.-5..7....7.-5...-5.-5...-5..7...-5.-5....7.-5....7..7...-5.-5...-5..7...-5..7
..7..7...-5..7....7.-5....7.-5...-5.-5....7..7....7..7...-5.-5....7.-5....7.-5
.-5..7....7..7....7.-5....7..7...-5.-5....7..7...-5..7....7.-5....7..7....7..7
..7..7....7.-5...-5.-5....7.-5...-5..7....7..7....7..7....7.-5....7.-5...-5..7
..7..7....7.-5...-5.-5....7..7...-5.-5...-5..7....7.-5....7.-5....7..7....7..7
CROSSREFS
Sequence in context: A230681 A209793 A115748 * A203921 A237918 A294147
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 22 2013
STATUS
approved

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Last modified August 31 14:40 EDT 2024. Contains 375567 sequences. (Running on oeis4.)