157609

Appears in sequences

• Smallest square containing n-th prime as substring.at n=36A029945
• sigma(n)-n is a perfect square associated with A049226.at n=27A049228
• Composite numbers k such that the sum of the divisors of k^2 is a prime.at n=33A065405
• Final terms of rows of A077346.at n=14A077347
• a(n) = x^2 = A090116(n)^2 is the least square that is "surrounded" by two closest primes, by prevprime(x^2) and nextprime(x^2) whose difference nextprime - prevprime = 2n.at n=23A090117
• Squares of the form 6p+7 for p prime (A110015) that are squares of a prime.at n=32A110586
• Squares for which both the sum of the digits and the product of the digits is a triangular number.at n=20A118490
• Squares that becomes a prime number when prefixed with a 9.at n=24A167724
• Number of nX4 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=7A207748
• Powerful numbers (A001694) which can be written as the sum of two relatively prime 3-powerful numbers (A036966) different from 1.at n=13A210470
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<2z.at n=23A212503
• Nontrivial prime powers (A025475) which are a sum of a smaller nontrivial prime power and a perfect cube.at n=14A226232
• Squares which have one or more occurrences of exactly six different digits.at n=10A235721
• Prime powers (A025475) such that the distance to the nearest prime power is an oblong number (A002378).at n=10A239521
• Discriminants of totally real cubic fields with noncyclic class group.at n=7A329785
• Discriminants with exactly 1 associated cyclic cubic field.at n=37A343022
• Composite numbers with primitive root 6.at n=38A346316
• a(0) = 397; a(n+1) = a(n)^2 if a(n) is prime, floor(a(n)/2) otherwise.at n=1A376801