42924

Appears in sequences

• Palindromes with exactly 6 prime factors (counted with multiplicity).at n=19A046332
• Let v = (1,4,9,...,n^2), x = (0,1,2,4,6,...) [first n terms of A002620]; a(n) = v.v * x.x - (v.x)^2.at n=13A060452
• Consider the line segment in R^n from the origin to the point v = (1,4,9,...,n^2); let d = squared distance to this line from the closest point of Z^n (excluding the endpoints). Sequence gives d times v.v.at n=12A060454
• a(n) is the odd-length palindrome whose digits up to the center are those of n and whose center digit is equal to the digital root of the product of the factorial of n and the reverse of n.at n=41A082941
• Smallest palindromic multiple of n in which n is a substring (anywhere), or 0 if n = 10k or no such number exists.at n=41A084044
• Palindromes divisible by the number formed by their internal digits.at n=54A088287
• A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=23A094952
• Palindromes n with the property that for some prime p, n = p + prime(p).at n=6A155214
• Numbers n such that n^6 + 545 is prime.at n=30A163592
• Palindromic numbers which are sum of consecutive squares.at n=32A180436
• Palindromic numbers which can be written as the sum of two or more consecutive squares.at n=22A216446
• Numbers k such that sigma(k - 2) = sigma(k + 2).at n=33A223091
• First term of n-th difference sequence of round((k*Pi)), k >= 0.at n=18A325846
• Numbers that are both palindromes (A002113) and terms of A072389.at n=8A346919
• Palindromes that can be written in more than one way as the sum of two distinct palindromic primes.at n=31A356854
• Palindromes that can be written in more than one way as the sum of two palindromic primes.at n=34A356881
• Triangle read by rows: T(n,k) = binomial(n+1,k+1)*Stirling2(n+k,k).at n=38A369381