Number of representations of n as a sum of products of distinct pairs of positive integers, n = Sum_{k=1..m} i_k*j_k with i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_k*j_k<i_{k+1}*j_{k+1}.
A212216
Number of representations of n as a sum of products of distinct pairs of positive integers, n = Sum_{k=1..m} i_k*j_k with i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_k*j_k<i_{k+1}*j_{k+1}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =6a(7) =7a(8) =8a(9) =12a(10) =15a(11) =18a(12) =25a(13) =28a(14) =34a(15) =44a(16) =51a(17) =59a(18) =75a(19) =87a(20) =103a(21) =124a(22) =143a(23) =163a(24) =198a(25) =228a(26) =261a(27) =310a(28) =354a(29) =404
External references
- oeis: A212216