214369

Appears in sequences

• a(n) = (12*n + 7)^2.at n=38A017606
• a(n) = prime^2 and digits of prime appear in a(n).at n=8A030081
• Squares-of-primes in which no two adjacent digits have the same parity.at n=18A030146
• Odd squares in which parity of digits alternates.at n=27A030156
• Powers of a prime lucky number (A031157) but excluding lucky numbers (A000959).at n=31A057609
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=22A058031
• Squares whose sum of digits as well as product of digits is a nonzero square.at n=9A061267
• Numbers k such that sigma_4(k)/sigma_2(k) is prime.at n=24A066109
• Squares with property that digits alternate in parity individually as well as in concatenation with previous terms.at n=19A068888
• Squares in which the k-th significant digit either divides k or is a multiple of k.at n=28A069560
• Composites which use less than all of their digits in their prime factorization.at n=27A074211
• a(1) = 0, then smallest square such that a(n+1) - a(n) is a palindrome.at n=14A075056
• Perfect powers pp(n) with perfect power index n.at n=31A075433
• Smallest powerful number (definition 1) such that a(n)+n is also powerful.at n=5A076444
• Prime powers of prime numbers such that the sum of its digits is also prime power of prime number.at n=21A076705
• a(n) is the least k such that k and k+n are adjacent powerful numbers.at n=5A103954
• Primes squared of the form k + prime(k).at n=10A104935
• Squares of the form prime(k)*prime(k+1) + 2*prime(k+1).at n=23A108604
• Squares of the form 4*A014574(n-1) + 1.at n=30A131706
• a(n) = (14*n+1)^2.at n=33A134934