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Search: id:A117563
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A117563 a(n) = A118534(n)/A117078(n) unless A117078(n) = 0 in which case a(n) = 0. +0
54
0, 0, 1, 0, 3, 1, 5, 3, 1, 9, 1, 3, 13, 3, 1, 1, 19, 5, 9, 23, 1, 15, 11, 9, 3, 33, 11, 35, 21, 3, 3, 5, 45, 3, 49, 5, 1, 3, 23, 1, 59, 9, 63, 27, 65, 11, 1, 3, 75, 45, 1, 79, 21, 35, 1, 1, 89, 5, 39, 93, 21, 9, 3, 103, 3, 3, 25, 3, 115, 69, 1, 39, 19, 1, 75, 29, 3, 3, 3, 21, 139, 3, 143, 61, 87 (list; graph; listen)
OFFSET

1,5

COMMENT

a(n) is the "level" of prime(n).

There is a unique decomposition of the primes: provided the level a(n) is > 0, we have prime(n) = weight * level + gap, or A000040(n)=A117078(n)*a(n)+A001223(n).

a(n) = 0 only for primes 2, 3 and 7.

A118534(n) = prime(n) - g(n) or A000040(n) - A001223(n) if prime(n) - g(n) > g(n), 0 otherwise.

LINKS

Remi Eismann, Table of n, a(n) for n = 1..10000

Remi Eismann, Java program to decompose a prime as weight*level + gap, or A117078(n)*A117563(n) + A001223(n)).

Remi Eismann, Decomposition of natural numbers into weight * level + jump and application to a new classification of prime numbers

EXAMPLE

a(7)=15/3=5; a(14)=39/13=3; a(16)=47/47=1; a(18)=55/11=5; a(29)=105/5=11

CROSSREFS

Cf. A117078, A118534.

Sequence in context: A122510 A102662 A142048 this_sequence A060439 A135224 A152203

Adjacent sequences: A117560 A117561 A117562 this_sequence A117564 A117565 A117566

KEYWORD

nonn

AUTHOR

Remi Eismann (reismann(AT)free.fr), Apr 29 2006, Feb 14 2008

EXTENSIONS

More terms from Robert G. Wilson v, May 05, 2006

Edited by N. J. A. Sloane (njas(AT)research.att.com), May 14 2006

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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