Number of base 26 n-digit numbers with adjacent digits differing by one or less.

A126380

Number of base 26 n-digit numbers with adjacent digits differing by one or less.

Terms

    a(0) =1a(1) =26a(2) =76a(3) =224a(4) =662a(5) =1960a(6) =5810a(7) =17238a(8) =51180a(9) =152040a(10) =451874a(11) =1343530a(12) =3995984a(13) =11888510a(14) =35378800a(15) =105307232a(16) =313517862a(17) =933569352a(18) =2780376498a(19) =8281841754a(20) =24672375600a(21) =73510750578a(22) =219049521636a(23) =652802078652

External references