Number of connected pairs of subsets of [n] with each being a different size.

A377464

Number of connected pairs of subsets of [n] with each being a different size.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =12a(4) =62a(5) =290a(6) =1292a(7) =5579a(8) =23606a(9) =98490a(10) =406862a(11) =1668689a(12) =6807704a(13) =27663441a(14) =112076057a(15) =453031502a(16) =1828018406a(17) =7366128866a(18) =29650536878a(19) =119249689265a(20) =479277846962

External references