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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 re-interpreting the binary expression 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
1
256, 16, 7, 24, 35, 54, 756, 612612, 2291867200, 5127061294109100000 (list; graph; listen)
OFFSET

1,1

COMMENT

The next term is larger than 2^64.

LINKS

Will Nicholes, Metaprime binary series..

FORMULA

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

EXAMPLE

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

CROSSREFS

Cf. A079708.

Sequence in context: A069409 A069435 A139305 this_sequence A103949 A057066 A093861

Adjacent sequences: A133484 A133485 A133486 this_sequence A133488 A133489 A133490

KEYWORD

nonn

AUTHOR

Will Nicholes (e1will(AT)yahoo.com), Nov 30 2007

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.


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