a(0)=1; a(n) is the smallest positive integer that cannot be obtained from the integers {1, ..., n} using each number at most once, and the operators addition and multiplication.

A354423

a(0)=1; a(n) is the smallest positive integer that cannot be obtained from the integers {1, ..., n} using each number at most once, and the operators addition and multiplication.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =22a(5) =58a(6) =233a(7) =827a(8) =3359a(9) =16631a(10) =114371a(11) =708278a(12) =3975838a(13) =35724478

External references