T(n,n), array T as in A047110.

Terms

a(0) =1a(1) =1a(2) =2a(3) =10a(4) =29a(5) =91a(6) =370a(7) =1305a(8) =4626a(9) =17888a(10) =66824a(11) =248839a(12) =955688a(13) =3646596a(14) =13892482a(15) =53548120a(16) =206439059a(17) =795884541a(18) =3083453744a(19) =11962794031a(20) =46444491143a(21) =180751142106a(22) =704383034528