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A079078 a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2). 7

%I #14 May 22 2021 04:25:48

%S 1,2,3,10,21,110,273,1870,5187,43010,150423,1333310,5565651,54665710,

%T 239322993,2569288370,12684118629,151588013830,773731236369,

%U 10156396926610,54934917782199,741416975642530,4339858504793721

%N a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2).

%e a(5)=110 because 2*5*11=110, the product of the first, third and fifth primes.

%o (PARI) A079078(n)=prod(i=0,(n-1)\2,prime(n-2*i)) \\ - _M. F. Hasler_, May 04 2008

%Y Cf. A006882, A002110.

%K nonn

%O 0,2

%A _Michael Joseph Halm_, Feb 02 2003

%E Last term corrected by _Jonathan Vos Post_, Feb 09 2006

%E Edited and corrected by _M. F. Hasler_, May 06 2008

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Last modified September 15 18:02 EDT 2024. Contains 375954 sequences. (Running on oeis4.)