24542

Appears in sequences

• Palindromic in bases 13 and 10.at n=21A029968
• Numbers n such that Catalan(n)-1 is prime.at n=39A053427
• Palindromic integers > 0, whose 'Reverse and Add!' trajectory (presumably) does not lead to another palindrome.at n=9A070001
• Palindromic even numbers with an odd number of distinct prime factors.at n=30A075809
• Palindromic even numbers with exactly 3 prime factors (counted with multiplicity).at n=35A075816
• Palindromic primes in base 7 (written in base 7).at n=23A117702
• Demi-tribonacci numbers (rounding up): a(0)=a(1)=0, a(2)=2; a(n) = ceiling( (a(n-1)+a(n-2)+a(n-3))/2 ).at n=48A180235
• Number of -4..4 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.at n=2A200200
• T(n,k)=Number of -k..k arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.at n=17A200204
• Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero second and third differences.at n=3A200207
• a(1) = a(2) = a(3) = 1; for n > 3, a(n) = ceiling((a(n-1) + a(n-2) + a(n-3))/2).at n=47A258875
• Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=20A259003
• Numbers k where k^2 is an anagram of (k+2)^2.at n=14A261749
• Colombian palindromes.at n=36A332970
• Palindromes (A002113) in A157037.at n=40A353703