26862

Appears in sequences

• Shifts left under XOR-convolution with itself.at n=11A007462
• Numbers that are palindromic, divisible by 11 and have an odd number of digits.at n=23A045571
• Palindromes with exactly 5 prime factors (counted with multiplicity).at n=35A046331
• Palindromes sandwiched between twin primes.at n=10A113838
• Palindromes which are sums of two consecutive primes.at n=20A162571
• Number of binary strings of length n with no substrings equal to 0001 0010 or 1100.at n=15A164451
• Starting position of the first occurrence of a string of 2^n in the decimal expansion of Pi.at n=11A194351
• List of integers m>0 with m-1 and m+1 both prime, and m-2, m, m+2 all practical.at n=12A209236
• Numbers n such that n is both the average of some twin prime pair p, q (q = p+2) (i.e., n = p+1 = q-1) and is also the arithmetic mean of the four numbers consisting of the two primes before p and the two primes after q.at n=35A256620
• Palindromic numbers such that the sum of the digits equals the number of divisors.at n=19A263720
• Partial sums of A147562.at n=42A272928
• Triples of practical numbers: numbers n such that n-2, n, n+2 are all practical numbers.at n=30A287682
• G.f.: Sum_{n>=0} (n+1) * ((1+x)^n - 1)^n.at n=5A326000
• Midpoints k of a pair of twin primes such that sigma(k) is also the midpoint of a pair of twin primes.at n=37A349981
• Palindromes that can be written in more than one way as the sum of two distinct palindromic primes.at n=11A356854
• Palindromes that can be written in more than one way as the sum of two palindromic primes.at n=13A356881
• a(n) = Sum_{1 <= x_1, x_2 <= n} sigma( n/gcd(x_1, x_2, n) ).at n=23A373129
• a(n) is the least palindrome that has exactly n palindromic divisors other than itself and 1.at n=15A378140