21316

Appears in sequences

• a(n) = (5*n + 1)^2.at n=29A016862
• a(n) = (6*n + 2)^2.at n=24A016934
• a(n) = (7*n + 6)^2.at n=20A017054
• a(n) = (8*n + 2)^2.at n=18A017090
• a(n) = (9*n + 2)^2.at n=16A017186
• a(n) = (10*n + 6)^2.at n=14A017342
• a(n) = (11*n + 3)^2.at n=13A017426
• a(n) = (12*n + 2)^2.at n=12A017546
• a(n) is the smallest square that is the sum of n distinct positive squares.at n=38A018936
• Squares k such that k and k^(3/2) have the same set of digits.at n=4A029798
• Smallest square containing n-th prime as substring.at n=31A029945
• Squares with initial digit '2'.at n=18A045785
• Squares with at least one of the decimal expansion digits occurring separated.at n=34A052082
• Squares whose product of digits is also a nonzero square.at n=18A053059
• Numbers which contain exactly the same digits (with the correct multiplicity) in 3 different smaller bases.at n=36A059828
• Squares with digital root 4.at n=32A061100
• a(n) = 4*prime(n)^2.at n=20A069262
• Perfect powers pp such that pp+1 is prime.at n=26A075408
• Smallest k^2 such that there are exactly n primes between k^2 and (k+1)^2.at n=32A076956
• Sort the digits of these squares into descending order and drop zeros to get primes.at n=28A082921