a(n) is the number of n-digit numbers whose difference between the largest and smallest digits is equal to 3.

A367244

a(n) is the number of n-digit numbers whose difference between the largest and smallest digits is equal to 3.

Terms

    a(0) =0a(1) =13a(2) =119a(3) =733a(4) =3815a(5) =18133a(6) =81599a(7) =354493a(8) =1504055a(9) =6278053a(10) =25904879a(11) =106011853a(12) =431253095a(13) =1746686773a(14) =7051884959a(15) =28403182813a(16) =114200118935a(17) =458563556293

External references