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Search: id:A081342
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| 1, 5, 34, 260, 2056, 16400, 131104, 1048640, 8388736, 67109120, 536871424, 4294968320, 34359740416, 274877911040, 2199023263744, 17592186060800, 140737488388096, 1125899906908160, 9007199254872064, 72057594038190080
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OFFSET
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0,2
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COMMENT
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Binomial transform of A034494. 5th binomial transform of (1,0,9,0,81,0,729,0,..).
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FORMULA
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a(n)=(8^n+2^n)/2. a(n)=10a(n-1)-16a(n-2), a(0)=1, a(1)=5. G.f.: (1-5x)/((1-2x)(1-8x)). E.g.f. exp(5x)cosh(3x).
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CROSSREFS
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Cf. A025551, A081343.
Sequence in context: A078284 A083987 A002776 this_sequence A058248 A116435 A090367
Adjacent sequences: A081339 A081340 A081341 this_sequence A081343 A081344 A081345
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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 18 2003
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