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A139473
a(n)=((2*Sqrt[2] + 3)^(2^(n - 1) - 1) - (3 - 2*Sqrt[2])^(2^(n - 1) - 1))/(4*Sqrt[2]).
3
0, 1, 35, 40391, 53789260175, 95393218491883573553951, 300027707381709879256191290532493317737977820735
OFFSET
1,3
MATHEMATICA
Table[Expand[((2*Sqrt[2] + 3)^(2^(n - 1) - 1) - (3 - 2*Sqrt[2])^(2^(n - 1) - 1))/(4*Sqrt[2])], {n, 1, 10}] (*Artur Jasinski*)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 22 2008
STATUS
approved