Binomial transform of the squared rows of the table A072233 (A008284).

Terms

a(0) =1a(1) =1a(2) =3a(3) =7a(4) =33a(5) =91a(6) =388a(7) =1163a(8) =4231a(9) =13297a(10) =44694a(11) =136621a(12) =444535a(13) =1335335a(14) =4149785a(15) =12327698a(16) =37154245a(17) =108185961a(18) =318923590a(19) =913506701a(20) =2633793550a(21) =7443298426a(22) =21073435606a(23) =58715695683a(24) =163805615535a(25) =450730653566