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A053823 Product of primes in n-th shell of prime spiral. 1
2, 111546435, 10334565887047481278774629361, 36134787795296163821030157447828794735407577182650673, 83897624105100872650777504146410004512537400341032979607327005665757086721210969 (list; graph; refs; listen; history; text; internal format)
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: A135235 A263645 A170998 * A322146 A262729 A034251

Adjacent sequences:  A053820 A053821 A053822 * A053824 A053825 A053826

KEYWORD

easy,nonn

AUTHOR

Enoch Haga, Apr 06 2000

STATUS

approved

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Last modified November 21 04:56 EST 2019. Contains 329350 sequences. (Running on oeis4.)