A053823 Product of primes in n-th shell of prime spiral.

2, 111546435, 10334565887047481278774629361, 36134787795296163821030157447828794735407577182650673, 83897624105100872650777504146410004512537400341032979607327005665751086721210969

Offset

0,1

Comments

Write primes in a spiral: the first shell contains a single prime, 2. The next shell contains 8 primes, etc.

Links

Table of n, a(n) for n=0..4.

Example

a(2)=3*5*7*11*13*17*19*23=111546435, the product of the 2nd through 9th primes.

Crossrefs

Cf. A053997, A053998, A053999.

Sequence in context: A263645 A367834 A170998 * A371643 A322146 A262729

Adjacent sequences: A053820 A053821 A053822 * A053824 A053825 A053826

Keyword

easy,nonn

Author

Enoch Haga, Apr 06 2000

Extensions

a(5) corrected by Sean A. Irvine, Jan 16 2022

Status

approved