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A151819 First component x of pairs (x,y) where x!+y! is a square, sorted on x. 1
0, 0, 0, 1, 1, 1, 2, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
COMMENTS
Conjecture: the only solutions for x!+y!=n^2 are x=0,0,0,1,1,1,2,4,4,4 and y=4,5,7,4,5,7,2,0,1,5 respectively.
LINKS
CROSSREFS
Added as a companion to A082871.
Sequence in context: A131118 A140765 A097541 * A079560 A330601 A088680
KEYWORD
nonn
AUTHOR
Farideh Firoozbakht, Jul 07 2009
STATUS
approved

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Last modified April 24 07:54 EDT 2024. Contains 371922 sequences. (Running on oeis4.)