A255305 The largest number that cannot be written as a sum of squarefree numbers that are the product of n primes.

6, 23, 299, 3439, 51637, 894211

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Example

a(1)=6 because each number that is 7 or larger can be written as the sum of distinct primes.
a(2)=23 because the squarefree numbers less than or equal to 23 that are the product of two primes are {6, 10, 14, 15, 21, 22} and there is no way to add some subset of these together to get 23; on the other hand every number greater than 23 can be so represented, i.e., 24=10+14, 25=10+15, 26=26, 27=6+21, 28=6+22, 30=6+10+14, and so on.

Crossrefs

Sequence in context: A013260 A013266 A154420 * A339628 A304271 A293590

Adjacent sequences: A255302 A255303 A255304 * A255306 A255307 A255308

Keyword

nonn,more

Author

Steve Butler, Feb 20 2015

Status

approved