Triangle read by rows: coefficients of harmonic-geometric polynomials.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =9a(5) =11a(6) =1a(7) =21a(8) =66a(9) =50a(10) =1a(11) =45a(12) =275a(13) =500a(14) =274a(15) =1a(16) =93a(17) =990a(18) =3250a(19) =4110a(20) =1764a(21) =1a(22) =189a(23) =3311a(24) =17500a(25) =38360a(26) =37044a(27) =13068a(28) =1a(29) =381