102030201
domain: N
Appears in sequences
- Palindromic squares.at n=21A002779
- Palindromic squares with an odd number of digits.at n=19A028817
- Palindromes whose sum of divisors is odd.at n=28A028984
- Palindromes whose square root is a palindrome.at n=15A057136
- Write n in binary then square as if written in base 10.at n=21A063009
- a(1) = 9; a(n) = smallest multiple of a(n-1) which is a palindromic square.at n=2A069501
- Palindromic perfect powers.at n=25A075786
- Palindromic numbers which are the product of a number k and its reversal (k written backwards).at n=29A158642
- Squares of A057148 taken as decimal numbers.at n=8A176923
- Palindromic squares whose sum of digits is also a palindromic square.at n=8A225739
- Palindromes in base 4 which are also squares.at n=9A263610
- Palindromes in base 5 which are also squares.at n=10A263612
- Squares whose largest decimal digit is 3.at n=8A277947
- Numbers of the form (10^c-1)*the product any two (not necessarily distinct) terms of A074992.at n=26A284691
- Squares whose arithmetic mean of digits is 1 (i.e., the sum of digits equals the number of digits).at n=8A316481
- a(n) = A128921(n)^2.at n=17A319483
- Squares using only decimal digits 0,1,2,3.at n=28A331543
- Perfect powers m^k, m >= 1, k >= 2 such that m and m^k both are palindromes.at n=19A348429
- 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=17A354078