Triangle of numerators in the square of the matrix A[i,j] = 1/i for j <= i, 0 otherwise.

Terms

a(0) =1a(1) =3a(2) =1a(3) =11a(4) =5a(5) =1a(6) =25a(7) =13a(8) =7a(9) =1a(10) =137a(11) =77a(12) =47a(13) =9a(14) =1a(15) =49a(16) =29a(17) =19a(18) =37a(19) =11a(20) =1a(21) =363a(22) =223a(23) =153a(24) =319a(25) =107a(26) =13a(27) =1a(28) =761a(29) =481