Number of (n+1) X (6+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.

A251234

Number of (n+1) X (6+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.

Terms

    a(0) =8982a(1) =14786a(2) =26224a(3) =50570a(4) =103926a(5) =225936a(6) =514950a(7) =1222090a(8) =3000620a(9) =7579486a(10) =19600410a(11) =51681580a(12) =138503810a(13) =376340486a(14) =1034918936a(15) =2876538978a(16) =8073696214a(17) =22868351328a(18) =65337863366a(19) =188245777530a(20) =546776950780

External references