Regular triangle T(n,k) of Dellac configurations with boundaries, n>=1 and k>=0.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =9a(5) =15a(6) =38a(7) =45a(8) =63a(9) =111a(10) =295a(11) =333a(12) =423a(13) =621a(14) =1131a(15) =3098a(16) =3393a(17) =4059a(18) =5373a(19) =8127a(20) =15123a(21) =42271a(22) =45369a(23) =52155a(24) =64665a(25) =87939a(26) =135729a(27) =256335a(28) =726734a(29) =769005