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A077353 a(n) = (concatenation in ascending order of divisors of 5^n)/5^n. 2
1, 3, 61, 12201, 2440201, 4880402001, 97608040020001, 1952160800400020001, 390432160080004000200001, 780864320160008000400002000001, 1561728640320016000800004000002000001, 31234572806400320016000080000040000020000001 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(0) = 1, a(n+1)) = 2*10^n*a(n) + 1.
EXAMPLE
a(5) = 15251256253125/3125 = 4880402001.
PROG
(PARI) a(n) = eval(concat(apply(x->Str(x), divisors(5^n))))/5^n \\ Max Alekseyev, Dec 12 2011
CROSSREFS
Sequence in context: A292110 A173366 A125661 * A220775 A089157 A068886
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 05 2002
EXTENSIONS
More terms from Max Alekseyev, Dec 12 2011
STATUS
approved

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Last modified July 13 20:42 EDT 2024. Contains 374288 sequences. (Running on oeis4.)