69696

Appears in sequences

• Palindromic squares.at n=12A002779
• Undulating squares.at n=13A016073
• a(n) = (6*n)^2.at n=44A016910
• a(n) = (7*n + 5)^2.at n=37A017042
• a(n) = (8*n)^2.at n=33A017066
• a(n) = (9*n + 3)^2.at n=29A017198
• a(n) = (10*n + 4)^2.at n=26A017318
• a(n) = (11*n)^2.at n=24A017390
• a(n) = (12*n)^2.at n=22A017522
• Squares using at most two distinct digits, not ending in 0.at n=21A018884
• Squares using no more than two distinct digits.at n=27A018885
• Palindromic squares with an odd number of digits.at n=11A028817
• Palindromic squares with odd number of digits and non-palindromic and "non-core" square roots.at n=1A028818
• Palindromes whose sum of divisors is odd.at n=15A028984
• Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 25 (most significant digit on right).at n=24A029518
• Squares in which parity of digits alternates.at n=32A030152
• Even squares in which parity of digits alternates.at n=11A030158
• a(n+1) is smallest square > a(n) having no digits in common with a(n), with a(0) = 0.at n=25A030288
• Squares which when written backwards remain square (final 0's excluded).at n=25A033294
• Number of possible rook moves on an n X n chessboard.at n=32A035006