T(n,n-5), array T as in A038730.

Terms

a(0) =1a(1) =12a(2) =80a(3) =393a(4) =1594a(5) =5676a(6) =18437a(7) =56070a(8) =162643a(9) =456169a(10) =1249622a(11) =3368279a(12) =8981185a(13) =23778766a(14) =62674883a(15) =164736197a(16) =432269179a(17) =1133152915a(18) =2968751841a(19) =7775322683a(20) =20360324313a(21) =53309942401a(22) =139575355815a(23) =365424013769