1212201

Appears in sequences

• Powers of 3 written in base 4.at n=8A004658
• Non-palindromic squares which when written backwards remain square (and still have the same number of digits).at n=24A035090
• n is odd and divisible by number of divisors of n and sum of digits of n.at n=18A057530
• Squares composed of digits {0,1,2}, not ending with zero.at n=6A058412
• Write n in binary then square as if written in base 10.at n=13A063009
• Squares k^2 such that reverse(k)^2 = reverse(k^2), excluding squares of palindromes.at n=22A064021
• Squares in every base >=3 (involving no carries and no digit apart from 0, 1 and 2).at n=12A066139
• a(n) = A129967(n) with digits reversed.at n=41A129970
• Perfect squares k such that each decimal digit of k is equal to the difference of at least two other digits of k.at n=20A255893
• Squares whose digital rotation is also a square.at n=11A275028
• Squares whose largest decimal digit is 2.at n=8A277946
• Squares using only decimal digits 0,1,2,3.at n=16A331543
• Squares k that are not divisible by 10, and whose reverse and digit sum are also squares, such that the digit sum divides both k and its reverse.at n=11A354078
• a(n) = (10^(n + 1) + 10^(n - min{v_2(n), v_5(n)}) + 1)^n, where v_p(n) indicates the p-adic valuation of n.at n=1A379243