Number of base 16 circular n-digit numbers with adjacent digits differing by 1 or less.

A124709

Number of base 16 circular n-digit numbers with adjacent digits differing by 1 or less.

Terms

    a(0) =1a(1) =16a(2) =46a(3) =106a(4) =282a(5) =746a(6) =2032a(7) =5588a(8) =15538a(9) =43522a(10) =122676a(11) =347528a(12) =988692a(13) =2822836a(14) =8084374a(15) =23214866a(16) =66819298a(17) =192723746a(18) =556887508a(19) =1611815768a(20) =4672057072a(21) =13560785792a(22) =39408774154a(23) =114653288678a(24) =333906950236

External references