22022

Appears in sequences

• Palindromic in bases 6 and 10.at n=18A029963
• Triangle of numbers of Dyck paths.at n=30A039797
• Triangle read by rows: numbers of Dyck paths.at n=33A039798
• Numbers having four 2's in base 10.at n=4A043500
• Numbers that are palindromic, divisible by 11 and have an odd number of digits.at n=19A045571
• Palindromes with exactly 5 prime factors (counted with multiplicity).at n=29A046331
• Composite palindromes whose sum of prime factors is palindromic (counted with multiplicity).at n=34A046354
• First numerator and then denominator of the elements to the right of the central elements of the 1/5-Pascal triangle (by row), excluding 1's and 5's.at n=50A046616
• Even numbers in the numerators of the 1/5-Pascal triangle (by row).at n=52A046625
• Distinct even numbers in the numerators of the 1/5-Pascal triangle (by row).at n=28A046626
• Distinct numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/5-Pascal triangle (by row).at n=52A046627
• Distinct even numbers in writing numerators of each element to the right of the central elements of the 1/5-Pascal triangle (by row).at n=22A046629
• Palindromic untouchable numbers.at n=27A048187
• Sequence of sums based on primes = 7 mod 8.at n=31A060108
• n repeated in decimal representation, but separated by enough zeros that the square has the pattern (n^2)(2n^2)(n^2).at n=21A077431
• Numbers whose name in American English is a word-palindrome, reading the same forward and backward.at n=30A081365
• Palindromes in A085934.at n=33A085935
• Palindromes in which the sum of the internal digits = the sum of the external digits.at n=17A088285
• a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)*2^(n-k-1)*(3/2)^(k-1).at n=11A099583
• Palindromes n such that 10n01 is a prime.at n=37A099744