222831

Appears in sequences

• a(0) = 1 and a(n) = A005169(n) - A005169(n-1).at n=26A289080
• Numbers k whose number of divisors equals the number of divisors in each of R(k), k+R(k), R(k+R(k)), abs(k-R(k)), and R(abs(k-R(k))), where R(m) is the digit reversal of m and where the reversals of m do not equal m.at n=6A346141
• a(n) = Sum_{k=0..floor(n/4)} 2^k * 3^(n-3*k) * binomial(k+2,2) * binomial(n-2*k,k) * binomial(n-3*k,k).at n=9A391986