33133

Appears in sequences

• Numbers having four 3's in base 10.at n=7A043504
• Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j.at n=11A082945
• Palindromic hypotenuses in primitive Pythagorean triples.at n=37A087456
• Near-repdigit semiprimes with 3 as repeated digit.at n=23A105984
• Palindromic primes in base 4 (written in base 4).at n=15A117699
• Palindromic primes in base 5 (written in base 5).at n=17A117700
• Palindromic numbers that contain the sum of their digits as a substring.at n=28A121939
• List of primitive words over the alphabet {1,3}.at n=48A213970
• Palindromic composite numbers starting with a digit 3.at n=39A222726
• Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-1,0,1}.at n=30A239551
• Numbers k for which the digital sum of k contains the same distinct digits as k itself.at n=40A249515
• Palindromes with no palindromic aliquot parts except 1.at n=28A257973
• L.g.f.: Sum_{n=-oo..+oo} (x - x^(2*n-1))^(2*n-1) / (2*n-1).at n=49A293129
• Numbers n such that there is precisely 1 group of order n, 2 of order n + 1 and 3 of order n + 2.at n=21A296024
• a(n) = (10^(2*n+1) - 1)/3 - 2*10^n.at n=2A332131
• Starhex honeycomb numbers: a(n) = 13 + 60*n + 60*n^2.at n=23A332243
• The inverse Euler transform of p(n) = n if n is prime, otherwise 1.at n=27A358452
• Numbers k that are the representation of primes in base 4 and in base 5.at n=30A359840
• Concatenations x||1||x for numbers x.at n=32A392225