Number of different fixed (possibly) disconnected pentominoes bounded tightly by an n X n square.

A163435

Number of different fixed (possibly) disconnected pentominoes bounded tightly by an n X n square.

Terms

    a(0) =0a(1) =0a(2) =102a(3) =1792a(4) =11550a(5) =46848a(6) =144550a(7) =371712a(8) =838782a(9) =1715200a(10) =3247398a(11) =5779200a(12) =9774622a(13) =15843072a(14) =24766950a(15) =37531648a(16) =55357950a(17) =79736832a(18) =112466662a(19) =155692800a(20) =211949598a(21) =284204800a(22) =375906342a(23) =491031552a(24) =634138750a(25) =810421248

External references