Number of base 12 n-digit numbers with adjacent digits differing by one or less.

Terms

a(0) =1a(1) =12a(2) =34a(3) =98a(4) =284a(5) =826a(6) =2408a(7) =7032a(8) =20562a(9) =60186a(10) =176312a(11) =516844a(12) =1515926a(13) =4448336a(14) =13058280a(15) =38345702a(16) =112633540a(17) =330918226a(18) =972433832a(19) =2858069380a(20) =8401323984a(21) =24698783724a(22) =72618671844a(23) =213530132914a(24) =627917268794