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A028228 Expansion of 1/((1-7x)(1-10x)(1-11x)(1-12x)). 0
1, 40, 1007, 20414, 364329, 5979036, 92485219, 1369339018, 19606630637, 273438929192, 3733694351751, 50109751007862, 662977655746225, 8667106208101108, 112162143040653803, 1438993526155501346 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n) = 40*a(n-1) -593*a(n-2) +3854*a(n-3) -9240*a(n-4), n>=4. - Vincenzo Librandi, Mar 18 2011

a(n) = 23*a(n-1) -132*a(n-2) +(10^(n+1) -7^(n+1))/3, n>=2. - Vincenzo Librandi, Mar 18 2011

a(n) = 6*12^(n+2)/5 -11^(n+3)/4 +5*10^(n+2)/3-7^(n+3)/60 . - R. J. Mathar, Mar 20 2011

CROSSREFS

Sequence in context: A172510 A004349 A016092 * A165380 A075907 A062143

Adjacent sequences:  A028225 A028226 A028227 * A028229 A028230 A028231

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 19 14:25 EDT 2014. Contains 240761 sequences.