211116

Appears in sequences

• Number of permutations P of {1,2,...,n} such that P(1)=1 and |P^-1(i+1)-P^-1(i)| equals 1 or 2 for i=1,2,...,n-1.at n=31A038718
• Numbers whose sum of digits s equals its product of digits and s + 1 and s - 1 are both prime.at n=29A061597
• Twice partition numbers.at n=46A139582
• Numbers k such that the product of their digits divides both k and R(k), where R(k) is the digits reverse of k.at n=44A277856
• Numbers that are divisible by the sum of their digits and for which the sum of digits equals the product of digits.at n=29A280355