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

7, 37, 2557, 32587, 543097, 10242787, 207263519017, 13394639596851067, 41295598995285955839203627497, 29987151430893484246716697508064240936086917614616072924464106966030597

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Formula

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

Example

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

Crossrefs

Cf. A125191; A002110.

Sequence in context: A210620 A250843 A078303 * A129736 A220852 A290176

Adjacent sequences: A127726 A127727 A127728 * A127730 A127731 A127732

Keyword

nonn

Author

Tomas Xordan, Apr 03 2007

Status

approved