Number of (n+1) X (1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally.

A232901

Number of (n+1) X (1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally.

Terms

    a(0) =0a(1) =4a(2) =8a(3) =12a(4) =32a(5) =84a(6) =184a(7) =412a(8) =976a(9) =2276a(10) =5224a(11) =12076a(12) =28032a(13) =64884a(14) =150040a(15) =347324a(16) =804144a(17) =1861124a(18) =4307400a(19) =9970252a(20) =23077600a(21) =53414548a(22) =123632504a(23) =286160860a(24) =662347408a(25) =1533063972a(26) =3548423976a(27) =8213173612a(28) =19010179136a(29) =44000880564

External references