A160179 - OEIS

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A160179

a(1)=2. a(n) equals the product of the previous terms divided by the (n-1)st prime gap.

2, 2, 2, 4, 8, 128, 8192, 134217728, 9007199254740992

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OFFSET

1,1

COMMENTS

Start with a(1)=2. Build a(n) as the product of all preceding terms divided by the n-minus-first prime gap. The sequence is limited to 9 terms because the 10th term is no longer an integer.

LINKS

Table of n, a(n) for n=1..9.

FORMULA

a(1) =2. a(n) = product_{i=1..n-1} a(i) / A001223(n-1), n>1.

EXAMPLE

a(8) = 2*2*2*4*8*128*8192/2 = 134217728.

CROSSREFS

Sequence in context: A262568 A183388 A274076 * A021822 A153986 A199889

Adjacent sequences: A160176 A160177 A160178 * A160180 A160181 A160182

KEYWORD

nonn,fini,full

AUTHOR

Valle Rogers (Vallerogers(AT)hotmail.com), May 03 2009

EXTENSIONS

Edited by R. J. Mathar, May 16 2009

STATUS

approved