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A104650 Numbers of primes n needed to sum to semiprime without multiplicity. +0
1
2, 3, 4, 6, 5, 8, 7 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(3)=4 because 2*7=14=2+2+5+5;

a(4)=6 because 3*5=15=2+2+2+3+3+3.

CROSSREFS

Cf. A001358.

Adjacent sequences: A104647 A104648 A104649 this_sequence A104651 A104652 A104653

Sequence in context: A090894 A136175 A129258 this_sequence A083179 A123503 A123717

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Apr 21 2005

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Last modified October 16 00:31 EDT 2008. Contains 145098 sequences.


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