Number of nX2 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300374

Number of nX2 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =3a(2) =2a(3) =10a(4) =13a(5) =42a(6) =74a(7) =188a(8) =387a(9) =885a(10) =1937a(11) =4275a(12) =9526a(13) =20871a(14) =46566a(15) =102205a(16) =227355a(17) =500590a(18) =1110398a(19) =2450549a(20) =5426150a(21) =11990298a(22) =26526428a(23) =58649475a(24) =129706253a(25) =286835657a(26) =634286359a(27) =1402736818a(28) =3101877239a(29) =6859804246

External references