978121

Appears in sequences

• 9-gonal square numbers.at n=4A036411
• Duplicate of A036411.at n=4A048912
• Sequence S_6 of the S_r family.at n=11A092184
• Largest n-digit square with no zero digits.at n=5A104266
• Numbers k such that concatenation of k and its 10's complement is a palindromic prime.at n=18A109627
• Squares whose digit reversal is a brilliant number (A078972).at n=31A115667
• a(n) = ((n+1)*(2*n-1))^2.at n=22A123198
• Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=29A207399
• The first of three consecutive positive integers the sum of the squares of which is equal to the sum of the squares of four consecutive positive integers.at n=4A261972
• a(n) = A379119(A379121(n)), where A379121 gives those odd squares k for which A379113(k) > 1 and A379119(n) = n/A379113(n).at n=23A379124