T(n,k)=Number of nXk 1..7 arrays with every element value z a city block distance of exactly z from another element value z.

A209215

T(n,k)=Number of nXk 1..7 arrays with every element value z a city block distance of exactly z from another element value z.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =3a(7) =16a(8) =16a(9) =3a(10) =3a(11) =152a(12) =488a(13) =152a(14) =3a(15) =16a(16) =1721a(17) =26029a(18) =26029a(19) =1721a(20) =16a(21) =24a(22) =24255a(23) =1958627a(24) =8460962a(25) =1958627a(26) =24255a(27) =24a(28) =114a(29) =399281

External references