T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

A222020

T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =6a(4) =27a(5) =6a(6) =13a(7) =188a(8) =188a(9) =13a(10) =28a(11) =1363a(12) =3875a(13) =1363a(14) =28a(15) =60a(16) =9838a(17) =86088a(18) =86088a(19) =9838a(20) =60a(21) =129a(22) =70994a(23) =1892859a(24) =5925053a(25) =1892859a(26) =70994a(27) =129a(28) =277a(29) =512456

External references