A127732 Primes of the form k# + (k+1)#,..,+(k+x)#+ 61; where k#,(k+1)#,(k+x)# are primorials numbers, members of A002110.

67, 97, 307, 2617, 32647, 543157, 10242847, 233335717, 6703028947, 7628001653887, 311878265181097, 565918396036931688582304087, 24039065352401162580869899907532787

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Formula

Prime(a)=A002110(n)+A002110(n+1)+...A002110(n+x) +61

Example

67 = A002110(3) + 61 = 6 + 61; 97 = A002110(3) + A002110(4) + 61 = 6 + 30 + 61; 307 = A002110(3) + A002110(4) + A002110(5) + 61 = 6 + 30 + 210 + 61; 2617 = A002110(3) + A002110(4) + A002110(5) + A002110(6) + 61 = 6 + 30 + 210 + 2310 + 61; 32647 = A002110(3) + A002110(4) + A002110(5) + A002110(6) + A002110(7) + 61 = 6 + 30 + 210 + 2310 + 30030 + 61;...

Crossrefs

Cf. A125191; A002110.

Sequence in context: A276307 A260806 A180557 * A071958 A128197 A140541

Adjacent sequences: A127729 A127730 A127731 * A127733 A127734 A127735

Keyword

nonn

Author

Tomas Xordan, Apr 03 2007

Status

approved