84872

Appears in sequences

• Numbers k such that all the following properties hold: (i) k*reverse(k) is a square; (ii) k != reverse(k); (iii) k and reverse(k) are not both squares; and (iv) k and reverse(k) have the same number of digits.at n=31A082994
• Members of A143610 for which both neighbors are squarefree.at n=23A166987
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..7 array extended with zeros and convolved with 1,3,3,1.at n=23A222026
• Number of binary strings of length n avoiding "squares" (that is, repeated blocks of the form xx) with |x| = 3.at n=18A230216