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Search: id:A123393
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A123393 Sequence allows us to find X values of the equation: 7(X-Y)^4-2XY=0 with X>=Y. +0
1
0, 32, 27000, 24193888, 21724523760 (list; graph; listen)
OFFSET

0,2

COMMENT

Sequence gives X values. To find Y values: b(n)=c(n)*(-1+d(n))which gives: 0,28,26880,24190292,21724416000,...

FORMULA

a(n)=c(n)*(1+d(n)) with c(0)=0,c(1)=2 and c(n)=30*c(n-1)-c(n-2) d(0)=1,d(1)=15 and d(n)=30*d(n-1)-d(n-2)

CROSSREFS

Sequence in context: A091201 A121913 A016877 this_sequence A016937 A074800 A054374

Adjacent sequences: A123390 A123391 A123392 this_sequence A123394 A123395 A123396

KEYWORD

nonn

AUTHOR

Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Oct 14 2006

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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