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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
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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
Table of n, a(n) for n=1..10.
CROSSREFS
Added as a companion to
A082871
.
Sequence in context:
A131118
A140765
A097541
*
A079560
A330601
A088680
Adjacent sequences:
A151816
A151817
A151818
*
A151820
A151821
A151822
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.)