A077352 - OEIS

A077352

a(n) = (concatenation in ascending order of divisors of 2^n)/2^n.

1, 6, 31, 156, 7801, 390051, 19502551, 9751275501, 4875637750501, 2437818875250501, 12189094376252505001, 60945471881262525005001, 304727359406312625025005001, 1523636797031563125125025005001

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

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

Cf. A077351, A069872, A077353.

Sequence in context: A026771 A289788 A065096 * A038223 A334650 A022034

Adjacent sequences: A077349 A077350 A077351 * A077353 A077354 A077355

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 05 2002

STATUS

approved