Half the number of n X n X n triangular binary arrays with each element having no more than two neighbors unequal to itself.

A183276

Half the number of n X n X n triangular binary arrays with each element having no more than two neighbors unequal to itself.

Terms

    a(0) =1a(1) =4a(2) =11a(3) =26a(4) =60a(5) =132a(6) =290a(7) =620a(8) =1322a(9) =2777a(10) =5848a(11) =12169a(12) =25419a(13) =52590a(14) =109375a(15) =225532a(16) =467758a(17) =962536a(18) =1993088a(19) =4096214a(20) =8473290a(21) =17401047a(22) =35973146a(23) =73841057a(24) =152593325a(25) =313133216a(26) =646942003a(27) =1327337686a(28) =2741920392a(29) =5625006348

External references