Number of 3Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301843
Number of 3Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =32a(2) =139a(3) =678a(4) =3182a(5) =15199a(6) =72514a(7) =346244a(8) =1653214a(9) =7893443a(10) =37688062a(11) =179946317a(12) =859175558a(13) =4102237937a(14) =19586633161a(15) =93518758201a(16) =446516665710
External references
- oeis: A301843