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A077352 a(n) = (concatenation in ascending order of divisors of 2^n)/2^n. 2
1, 6, 31, 156, 7801, 390051, 19502551, 9751275501, 4875637750501, 2437818875250501, 12189094376252505001, 60945471881262525005001, 304727359406312625025005001, 1523636797031563125125025005001 (list; graph; refs; listen; history; internal format)
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 (amnalexander(AT)yahoo.com), Feb 27 2005

EXAMPLE

a(6) = 1248163264/64=19502551.

CROSSREFS

Cf. A077351, A069872, A077353.

Sequence in context: A003463 A026771 A065096 * A038223 A022034 A047665

Adjacent sequences:  A077349 A077350 A077351 * A077353 A077354 A077355

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 05 2002

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.