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Search: id:A128625
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| A128625 |
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Expansion of (1+3x)/(1-5x). |
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+0
1
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| 1, 8, 40, 200, 1000, 5000, 25000, 125000, 625000, 3125000, 15625000, 78125000, 390625000, 1953125000, 9765625000, 48828125000, 244140625000, 1220703125000, 6103515625000, 30517578125000, 152587890625000, 762939453125000
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Binomial transform of A102900(n+1).
Hankel transform is := 1,-24,0,0,0,0,0,0,0,0,0,... [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 02 2008]
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FORMULA
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a(n)=(8/5)*5^n-(3/5)*0^n; a(0)=1, a(n)=sum{k=0..n, ((n+k)/n)*C(n,k)2^(n-k)*3^k},n>0;
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CROSSREFS
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Sequence in context: A165665 A000760 A155616 this_sequence A037598 A037703 A051199
Adjacent sequences: A128622 A128623 A128624 this_sequence A128626 A128627 A128628
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Mar 14 2007
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