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A077352
a(n) = (concatenation in ascending order of divisors of 2^n)/2^n.
3
1, 6, 31, 156, 7801, 390051, 19502551, 9751275501, 4875637750501, 2437818875250501, 12189094376252505001, 60945471881262525005001, 304727359406312625025005001, 1523636797031563125125025005001
OFFSET
1,2
FORMULA
For n>1: a(n) = (a(n-1)*2^(n-2)*10^(1+floor(log_10 (2^(n-1))))+2^n)/(2^n) - Sam Alexander, Feb 27 2005
EXAMPLE
a(6) = 1248163264/64=19502551.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 05 2002
STATUS
approved