If A is a set of integers, the (2-fold) sumset consists of all the numbers which can be written as the sum of two (not necessarily distinct) elements in A. a(n) is the number of subsets of [1,2n] which are sumsets for some set of positive integers.
A120411
If A is a set of integers, the (2-fold) sumset consists of all the numbers which can be written as the sum of two (not necessarily distinct) elements in A. a(n) is the number of subsets of [1,2n] which are sumsets for some set of positive integers.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =15a(4) =30a(5) =59a(6) =114a(7) =219a(8) =416a(9) =783a(10) =1461a(11) =2722a(12) =5048a(13) =9341a(14) =17243a(15) =31674a(16) =58037a(17) =105936a(18) =192522a(19) =348832
External references
- oeis: A120411