|
%I #7 Jan 16 2022 22:09:38
%S 2,111546435,10334565887047481278774629361,
%T 36134787795296163821030157447828794735407577182650673,
%U 83897624105100872650777504146410004512537400341032979607327005665751086721210969
%N Product of primes in n-th shell of prime spiral.
%C Write primes in a spiral: the first shell contains a single prime, 2. The next shell contains 8 primes, etc.
%e a(2)=3*5*7*11*13*17*19*23=111546435, the product of the 2nd through 9th primes.
%Y Cf. A053997, A053998, A053999.
%K easy,nonn
%O 0,1
%A _Enoch Haga_, Apr 06 2000
%E a(5) corrected by _Sean A. Irvine_, Jan 16 2022
| 