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A127729 Primes of the form k# + (k+1)#,..,+(k+x)#+1; where k#,(k+1)#,(k+x)# are primorials numbers, members of A002110. 1

%I #2 Sep 24 2013 09:24:39

%S 7,37,2557,32587,543097,10242787,207263519017,13394639596851067,

%T 41295598995285955839203627497,

%U 29987151430893484246716697508064240936086917614616072924464106966030597

%N Primes of the form k# + (k+1)#,..,+(k+x)#+1; where k#,(k+1)#,(k+x)# are primorials numbers, members of A002110.

%F prime(a)=A002110(n)+A002110(n+1)+...A002110(n+x) +1

%e 7=A002110(3) +1 = 6+1;37= A002110(3)+A002110(4)+1 = 6+30+1; 2557= A002110(3)+A002110(4)+A002110(5)+A002110(6)+1= 6+30+210+2310 +1; 32587=A002110(3)+A002110(4)+A002110(5)+A002110(6)+A002110(7)+1=6+30+210+2310+30030+1

%Y Cf. A125191; A002110.

%K nonn

%O 1,1

%A _Tomas Xordan_, Apr 03 2007

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Last modified August 7 03:39 EDT 2024. Contains 375008 sequences. (Running on oeis4.)