29991

Appears in sequences

• Numbers k such that R(k+9) = 3.at n=3A086947
• Numbers n such that reversal(n) = (2/3)*n - 2.at n=4A101703
• Shifts 9 places left under Euler transform with a(0)=0 and a(n)=1 for n<9.at n=38A218026
• The number of n-digit numbers in A270048.at n=9A270270
• Numbers n with the property that k*n and (k+1)*n have a common nonzero digit for all k.at n=39A308466
• a(n) = A019565(1+n) - A019565(A001065(n)), where A019565 is the base-2 exp-function, and A001065 is the sum of proper divisors of n.at n=61A379496