111133
domain: N
Appears in sequences
- Numbers with multiplicative digital root value 9.at n=36A034056
- Numbers whose product of decimal digits equals its sum of binary digits.at n=38A064003
- a(n) = Sum_{k=1..n} floor(binomial(n,k)/k).at n=20A101687
- 6-digit numbers k such that: (a) the digits of k are from the set {1, 2, 3, 4, 5}, and (b) any digit that appears in k appears at least twice.at n=2A171725
- a(0)=0, a(1)=1, a(2n)=18*a(n), a(2n+1)=a(2n)+1.at n=29A197352
- Composite numbers whose multiplicative digital root is 9.at n=29A201024
- Number of distinct values of the sum of 5 products of three 0..n integers.at n=28A225262
- Minimal representation (considered minimal in any canonical base b > 3) of n in a binary system with two distinct digits "1" and "3", not allowing zeros, where a digit d in position p (p = 1,2,3,...,n) represents the value d^p.at n=15A237454