a(1)=1. For n>1, a(n) is the smallest even number such that every subset of a(1), ..., a(n) adds to a nonprime.

A128688

a(1)=1. For n>1, a(n) is the smallest even number such that every subset of a(1), ..., a(n) adds to a nonprime.

Terms

    a(0) =1a(1) =8a(2) =24a(3) =86a(4) =90a(5) =780a(6) =5940a(7) =52350a(8) =278460a(9) =40768260a(10) =6847205430

External references