Largest entry in a 2-composition of n, summed over all 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.
A181339
Largest entry in a 2-composition of n, summed over all 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.
Terms
- a(0) =2a(1) =9a(2) =38a(3) =149a(4) =562a(5) =2066a(6) =7474a(7) =26737a(8) =94900a(9) =334909a(10) =1176842a(11) =4121632a(12) =14397370a(13) =50185498a(14) =174628420a(15) =606755258a(16) =2105552976a(17) =7298685677a(18) =25275876584a(19) =87457546835a(20) =302382185770
External references
- oeis: A181339