A104650 Numbers of primes n needed to sum to semiprime without multiplicity.

2, 3, 4, 6, 5, 8, 7

Offset

1,1

Links

Table of n, a(n) for n=1..7.

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.

Sequence in context: A360633 A129258 A256988 * A083179 A123503 A123717

Adjacent sequences: A104647 A104648 A104649 * A104651 A104652 A104653

Keyword

nonn

Author

Giovanni Teofilatto, Apr 21 2005

Status

approved