30303

Appears in sequences

• Numbers that are palindromic in bases 8 and 10.at n=22A029804
• Lucky numbers that are both palindromic and nonprime.at n=37A031880
• Numbers that, when expressed in base 3 and then interpreted in base 10, yield a multiple of the original number.at n=35A032537
• Base-10 palindromes that starts with 3.at n=25A043038
• Composite palindromes divisible by the sum of their prime factors (counted with multiplicity).at n=5A046348
• Palindromes expressible as the sum of 3 consecutive palindromes.at n=22A046498
• a(n) = n*(n+1)*(2*n+1)*(n^2+n+3)/30.at n=13A061927
• a(n) = n * (100^n - 1)/99.at n=2A064100
• Palindromes in A082939.at n=23A082940
• Palindromes in A085934.at n=36A085935
• Beginning with 1, palindromes such that successive differences are distinct primes.at n=15A088052
• Numbers n which are a proper multiple (>1) of A068505(n) (= n read in base m+1 where m = largest digit of n).at n=37A089584
• Fifth column (m=4) of (1,3)-Pascal triangle A095660.at n=25A095661
• Numbers which are the sum of two positive cubes and divisible by 37.at n=34A102618
• a(1) = 1, then the rearrangement of odd palindromes such that every concatenation is a prime for n > 1.at n=36A113578
• Palindromes with digit sum 9.at n=12A121476
• Undulating Harshad numbers: numbers divisible by the sum of their own digits with decimal expansions in an abab...ab pattern.at n=48A129120
• Palindromes that are the sum of two positive cubes.at n=11A162710
• Numbers whose decimal expansion contains only 0's and 3's.at n=21A169966
• 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=22A210890