Square array A by downward antidiagonals: A(n,k) = (3 + 3^n*(2*floor(3*k/2) - 1))/6, n,k >= 1; read as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...

A254051

Square array A by downward antidiagonals: A(n,k) = (3 + 3^n*(2*floor(3*k/2) - 1))/6, n,k >= 1; read as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...

Terms

    a(0) =1a(1) =3a(2) =2a(3) =4a(4) =8a(5) =5a(6) =6a(7) =11a(8) =23a(9) =14a(10) =7a(11) =17a(12) =32a(13) =68a(14) =41a(15) =9a(16) =20a(17) =50a(18) =95a(19) =203a(20) =122a(21) =10a(22) =26a(23) =59a(24) =149a(25) =284a(26) =608a(27) =365a(28) =12a(29) =29

External references