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A133487 The first term is 256; each subsequent term in the series is computed by translating the previous term to binary, then reinterpreting the binary expansion as a product of metaprimes. Metaprimes follow the form p^(2^n) where p is a prime number and n is a nonnegative integer. See the link for more detailed explanation. 0
256, 16, 7, 24, 35, 54, 756, 612612, 2291867200, 5127061294109100000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term is larger than 2^64.

LINKS

Table of n, a(n) for n=1..10.

Will Nicholes, Metaprime binary series..

FORMULA

a(0)=256, a(n) = A052330(a(n-1)).

EXAMPLE

35 decimal is 100011 binary; 100011 is reinterpreted as (9^1)(7^0)(5^0)(4^0)(3^1)(2^1) = 54.

CROSSREFS

Cf. A079708.

Sequence in context: A139305 A160514 A203813 * A342039 A188830 A103949

Adjacent sequences:  A133484 A133485 A133486 * A133488 A133489 A133490

KEYWORD

nonn,more

AUTHOR

Will Nicholes, Nov 30 2007

STATUS

approved

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Last modified June 14 05:10 EDT 2021. Contains 345018 sequences. (Running on oeis4.)