24442

Appears in sequences

• Number of compositions of n into prime parts.at n=29A023360
• Numbers that are palindromic, divisible by 11 and have an odd number of digits.at n=21A045571
• Palindromes with exactly 4 palindromic prime factors (counted with multiplicity).at n=12A046378
• a(n) = smallest palindrome > a(n-1) such that a(1)*a(2)*...*a(n) - 1 is a prime.at n=30A051954
• n sets a new record for the number of integers k such that k is not of the form m + reverse(m) for any m and n occurs in the 'Reverse and Add' trajectory of k (cf. A067284).at n=19A067287
• Numbers n for which there are exactly ten k such that n = k + reverse(k).at n=24A072434
• a(1) = 2, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).at n=3A082777
• Expansion of x*(11 + 22*x + 20*x^2)/((1-x)*(1+x)*(1 - 10*x^2)).at n=8A094620
• Expansion of g.f. x*(2+22*x+11*x^2)/((x-1)*(1+x)*(10*x^2-1)).at n=8A094625
• Numbers n such that primorial(n)/2 - 64 is prime.at n=31A139448
• Number of (n+1) X 4 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.at n=15A186456
• Number of (3+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=8A250785
• a(n) = A023360(A000040(n)): number of compositions of prime(n) into prime parts.at n=9A265112
• Number of compositions (ordered partitions) of n into parts having the same number of divisors as n.at n=29A301331
• Number of compositions (ordered partitions) of n into parts having the same number of prime divisors (counted with multiplicity) as n.at n=29A301333
• a(1) = 2, a(n) = smallest palindromic nontrivial multiple of a(n-1) containing all decimal digits of a(n-1).at n=3A342232
• Palindromes in base 10 that are the product of two repdigit numbers.at n=52A368944
• a(n) = a(n-1) + rotate(a(n-1), n-2 digits right) with a(1) = 1.at n=16A374731