Array read by ascending antidiagonals: A(n,k) = A376484/(2*n+1).

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =3a(5) =9a(6) =1a(7) =3a(8) =10a(9) =27a(10) =1a(11) =3a(12) =10a(13) =35a(14) =81a(15) =1a(16) =3a(17) =10a(18) =35a(19) =125a(20) =243a(21) =1a(22) =3a(23) =10a(24) =35a(25) =126a(26) =450a(27) =729a(28) =1a(29) =3