Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2.

A275223

Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2.

Terms

    a(0) =5a(1) =36a(2) =61a(3) =187a(4) =648a(5) =2282a(6) =8134a(7) =29027a(8) =103456a(9) =368889a(10) =1315431a(11) =4690476a(12) =16725240a(13) =59638892a(14) =212660009a(15) =758302172a(16) =2703951339a(17) =9641739667a(18) =34380480348a(19) =122593793026a(20) =437144505226

External references