27072

Appears in sequences

• a(n) = (2*n - 1)*n^2.at n=24A015237
• Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^4.at n=31A028628
• Even palindromes in which parity of digits alternates.at n=40A030149
• Number of reversible strings with n-1 beads of 2 colors. 6 beads are black. Strings are not palindromic.at n=14A032093
• Palindromic and divisible by 8.at n=38A045643
• Palindromes with exactly 9 prime factors (counted with multiplicity).at n=4A046335
• Palindromes arising in A053779.at n=4A053780
• 9 times octagonal numbers: a(n) = 9*n*(3*n-2).at n=32A064201
• Palindromes in A082939.at n=22A082940
• Smallest nontrivial palindromic multiple of the n-th palindrome (a(n) is not equal to the n-th palindrome).at n=36A083145
• Smallest palindromic multiple of n-th palindrome which is not a concatenation of copies of that palindrome.at n=36A083146
• Smallest palindromic multiple (not equal to the number itself) of the palindromes not included earlier.at n=36A085920
• Palindromes whose perfect deficiency (A109883) is also palindromic.at n=18A110002
• a(n+1) = least palindrome not already used that is either a divisor or multiple of a(n) such that the ratios a(n+1)/a(n) are all distinct.at n=43A111678
• Biquadrateful (i.e., not biquadrate-free) palindromes.at n=17A133514
• Palindromic cyclops numbers.at n=25A138131
• Sum of divisors of the number of partitions of n.at n=36A139041
• Integral quotients of products of consecutive composites divided by their sums: sums (divisors).at n=39A141091
• Number of permutations of floor(i*7/5), i=0..n-1, with all sums of 4 adjacent terms unique.at n=7A152341
• Integer averages of the first perfect cubes up to some n^3.at n=34A164577