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A049299 a(0) = 1, a(n) = product{k = 0 to n-1}[ a(k)+a(n-k) ]. 0
1, 2, 9, 400, 19456921, 1101216948902114953248 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

lim_{m -> oo} log(a[m+1])/log(a[m]) exists and equals 3. - Roland Bacher (Roland.Bacher(AT)ujf-grenoble.fr), Sep 06 2004.

EXAMPLE

a(3)=400 because 400=(1+9)*(2+2)*(9+1).

CROSSREFS

Cf. A000108 (Catalan numbers) where a(0) = 1, a(n) = sum{k = 0 to n-1}[ a(k)*a(n-k) ], A000012 (constant 1) where a(0) = 1, a(n) = product{k = 0 to n-1}[ a(k)*a(n-k) ] and A025192 (2*3^(n-1)) where a(0) = 1, a(n) = sum{k = 0 to n-1}[ a(k)+a(n-k) ] - Henry Bottomley (se16(AT)btinternet.com), May 16 2000

Sequence in context: A013169 A012991 A003818 * A024225 A000883 A086693

Adjacent sequences:  A049296 A049297 A049298 * A049300 A049301 A049302

KEYWORD

easy,nonn

AUTHOR

Leroy Quet

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Last modified February 15 05:12 EST 2012. Contains 205694 sequences.