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A081106
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6th binomial transform of (1,1,0,0,0,0,......).
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3
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1, 7, 48, 324, 2160, 14256, 93312, 606528, 3919104, 25194240, 161243136, 1027924992, 6530347008, 41358864384, 261213880320, 1645647446016, 10344069660672, 64885527871488, 406239826673664, 2538998916710400
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Main diagonal of array defined by m(1,j)=j; m(i,1)=i and m(i,j)=m(i-1,j)+5*m(i-1,j-1) - Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 13 2003
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FORMULA
| a(n)=12*a(n-1)-36*a(n-2), a(0)=1, a(1)=7. a(n)=(n+6)*6^(n-1). G.f.: (1-5x)/(1-6x)^2
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CROSSREFS
| Cf. A079028, A081105, A006234.
Sequence in context: A124880 A171312 A186161 * A036829 A164591 A004187
Adjacent sequences: A081103 A081104 A081105 * A081107 A081108 A081109
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KEYWORD
| easy,nonn
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Mar 07 2003
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