Triangle read by rows: T(n,k) = number of sequences of n positive integers with reciprocals adding up to k (k=1,2,...,n).

A280519

Triangle read by rows: T(n,k) = number of sequences of n positive integers with reciprocals adding up to k (k=1,2,...,n).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =10a(4) =3a(5) =1a(6) =215a(7) =41a(8) =6a(9) =1a(10) =12231a(11) =1115a(12) =105a(13) =10a(14) =1a(15) =2025462a(16) =74862a(17) =3466a(18) =215a(19) =15a(20) =1a(21) =1351857641a(22) =14294210a(23) =267281a(24) =8372a(25) =385a(26) =21a(27) =1a(29) =10837663111a(30) =57646358

External references