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A163395
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a(n)=(nth even nonprime)^(nth even number).
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1
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1, 16, 1296, 262144, 100000000, 61917364224, 56693912375296, 72057594037927936, 121439531096594251776, 262144000000000000000000, 705429498686404044207947776, 2315513501476187716057433112576
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Here n-th even number = A005843(n), n-th even nonprime = A163300(n) (A014076 U A163300 = A141468).
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FORMULA
| a(n)=A163300^A005843(n).
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EXAMPLE
| a(1)=0^0=1, a(2)=4^2=16, a(3)=6^2=1296.
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MAPLE
| A163300 := proc(n) if n = 1 then 0; else for a from procname(n-1)+2 by 2 do if not isprime(a) then return a; end if; end do; end if; end proc: A005843 := proc(n) 2*n ; end: A163395 := proc(n) A163300(n)^A005843(n-1) ; end: seq(A163395(n), n=1..13) ; [From R. J. Mathar (mathar(AT)str.w.leidenuniv.nl), Oct 14 2009]
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CROSSREFS
| Cf. A005843, A014076, A141468, A163300.
Sequence in context: A072914 A007480 A186420 * A134375 A057994 A160251
Adjacent sequences: A163392 A163393 A163394 * A163396 A163397 A163398
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KEYWORD
| nonn
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 26 2009
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EXTENSIONS
| Extended by R. J. Mathar (mathar(AT)str.w.leidenuniv.nl), Oct 14 2009
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