Number of length n+7 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.
A255667
Number of length n+7 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.
Terms
- a(0) =65536a(1) =262144a(2) =1020000a(3) =3083292a(4) =7323894a(5) =15269184a(6) =29577432a(7) =53275408a(8) =90990131a(9) =149141772a(10) =236469626a(11) =364664160a(12) =549120490a(13) =809830656a(14) =1172434356a(15) =1669450392a(16) =2341713998a(17) =3240048488a(18) =4427203308a(19) =5980094628a(20) =7992389097
External references
- oeis: A255667