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A078225
a(n) = A078221(n+1)/A078221(n).
5
3, 3, 11, 101, 10001, 100000001, 10000000000000001, 100000000000000000000000000000001, 10000000000000000000000000000000000000000000000000000000000000001
OFFSET
1,1
FORMULA
For n>2, a(n) = 10^(2^(n-3))+1
MAPLE
A078221 := proc(n) if n =1 then 1 ; elif n = 2 then 3 ; else 10^(2^(n-3))-1 ; fi ; end: A078225 := proc(n) A078221(n+1)/A078221(n) ; end: for n from 1 to 20 do print(A078225(n)) ; od ; # R. J. Mathar, Feb 03 2007, using the formula for A078221
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 23 2002
EXTENSIONS
More terms from R. J. Mathar, Feb 03 2007, using the formula for A078221
a(5) corrected by Max Alekseyev, Aug 21 2013
STATUS
approved