Number of n X 4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s.

A297729

Number of n X 4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s.

Terms

    a(0) =1a(1) =15a(2) =34a(3) =93a(4) =502a(5) =1443a(6) =4676a(7) =19601a(8) =62749a(9) =212944a(10) =806349a(11) =2715704a(12) =9383104a(13) =34004795a(14) =117138709a(15) =407907961a(16) =1450394287a(17) =5045390250a(18) =17630646061a(19) =62173678114a(20) =217189833443a(21) =760130838978

External references