573049

Appears in sequences

• a(n) = prime^2 and digits of prime appear in a(n).at n=18A030081
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=28A058031
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.at n=11A208104
• Numbers n such that the product of their proper divisors is a palindrome > 1 and not equal to n.at n=19A229970
• Squares representable as k*m + k + m, where k >= m > 1 are squares.at n=36A256074
• Squares k (not ending in 0) such that the integer that is built up by concatenating the floors of the square roots of the two-digit numbers into which the original number is separated (from right to left) is the square root of the original number.at n=40A294497
• a(n) = sigma_3(n)^2.at n=8A356534
• Semiprimes whose prime factors are the digit reversal of each other.at n=30A376746
• Powers p^m, with prime p and m > 1, such that neither p^m-1 nor p^m+1 are squarefree.at n=34A389960