30503

Appears in sequences

• Octal palindromes which are also primes.at n=28A006341
• Base-10 palindromes that starts with 3.at n=27A043038
• Numbers that are palindromic, divisible by 11 and have an odd number of digits.at n=26A045571
• Sum of the first n safe primes.at n=38A066869
• Multiples of 11 with digit sum 11, with no zero digits in odd places.at n=29A083512
• Palindromes in A083512.at n=2A083513
• G.f.: A(x) = 1/(1-x - x/(1-x - x^2/(1-x - x^3/(1-x - x^4/(1-x - x^5/(...)))))), a continued fraction.at n=10A088355
• Numbers k such that k and k^2 use only the digits 0, 3, 4, 5 and 9.at n=6A136929
• 10^n*(5+3*10^n)+3.at n=2A171630
• Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers (without the dots).at n=24A210890
• Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers. Leading zeros of the terms are suppressed.at n=23A210892
• Numbers whose square is the sum of the squares of 11 consecutive integers.at n=5A218395
• Palindromic composite numbers starting with a digit 3.at n=19A222726
• Palindromes m such that m*(sum of digits of m) is also a palindrome.at n=34A229805
• Numbers such that the sequence of all possible sums of divisors of n is increasing but not strictly so, the sums being ordered by their characteristic functions, seen as binary numbers (see example).at n=14A230492
• Number of partitions of n containing m(1) as a part, where m denotes multiplicity.at n=44A240486
• Palindromes that are multiples of 11 and whose digit sum is also a multiple of 11.at n=10A346221