Number of -3..3 arrays of n elements with first through fourth differences also in -3..3.

A202659

Number of -3..3 arrays of n elements with first through fourth differences also in -3..3.

Terms

    a(0) =7a(1) =37a(2) =153a(3) =475a(4) =1101a(5) =2591a(6) =6055a(7) =14199a(8) =33289a(9) =78119a(10) =183447a(11) =430889a(12) =1011945a(13) =2376423a(14) =5580971a(15) =13107163a(16) =30782605a(17) =72293525a(18) =169783471a(19) =398743229a(20) =936465399a(21) =2199327501a(22) =5165208441a(23) =12130703729a(24) =28489466517a(25) =66908707817

External references