A125517 - OEIS

%I #14 Apr 11 2022 22:04:42

%S 0,3,5,9,21,65,321,1383,7221,40414,245312,1552223,10217560,69410576,

%T 485081195,3473135825

%N Number of prime 5-tuples up to 10^n.

%e a(3)=5 because there are 5 prime 5-tuples less than 10^3: 3 of the form p + 0,2,6,8,12 (for p = 5,11 and 101) and 2 of the form p + 0,4,6,10,12 (for p = 7 and 97).

%Y Cf. A022006, A022007.

%K nonn,more

%O 1,2

%A _Martin Raab_, Jan 21 2007

%E a(13)-a(15) from _Norman Luhn_, Nov 05 2021

%E a(16) from _Norman Luhn_, Nov 09 2021