Number of base 7 circular n-digit numbers with adjacent digits differing by 1 or less.

A124700

Number of base 7 circular n-digit numbers with adjacent digits differing by 1 or less.

Terms

    a(0) =1a(1) =7a(2) =19a(3) =43a(4) =111a(5) =287a(6) =763a(7) =2051a(8) =5575a(9) =15271a(10) =42099a(11) =116651a(12) =324591a(13) =906367a(14) =2538331a(15) =7126403a(16) =20049671a(17) =56509639a(18) =159514963a(19) =450865067a(20) =1275778031a(21) =3613401695a(22) =10242581819a(23) =29053799555a(24) =82461727687a(25) =234163952487

External references