143641

Appears in sequences

• a(n) = (10*n + 9)^2.at n=37A017378
• a(n) = (11*n + 5)^2.at n=34A017450
• a(n) = (12*n + 7)^2.at n=31A017606
• Numbers k such that k + 1 has one more divisor than k.at n=35A055927
• a(n) = n*(n+1)*(n+2)*(n+3)+1 = (n^2 + 3*n + 1)^2.at n=18A062938
• Numbers n such that sigma(d(n^3))==d(sigma(n^2)), where d(n) is the number of divisors of n.at n=27A063797
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=20A080026
• Smallest square which is one more than the product of n distinct numbers > 1.at n=6A081948
• Triangular numbers + 1 squared.at n=27A086601
• Unsigned member r=-18 of the family of Chebyshev sequences S_r(n) defined in A092184.at n=5A099276
• Numbers m such that Sum_{p prime|m} p^r(p) = m, where r(p) is the least positive primitive root of p (A001918).at n=37A101051
• Numbers which when chopped into one, two or more parts, added and squared result in the same number.at n=15A104113
• "Binary prime squares": squares whose binary expansions, read as decimal expansions, are primes.at n=16A108324
• a(n) = (14*n+1)^2.at n=27A134934
• Squares that becomes primes when prefixed with a 3.at n=31A167718
• Numbers n such that max(tau(n),tau(n+1),tau(n+2))- min(tau(n),tau(n+1),tau(n+2)) = 1.at n=26A173149
• Prime powers p^k with even exponents k > 0 such that (1 + p^k)/2 is prime.at n=22A192618
• Squares representable as b! + triangular(c).at n=32A230365
• The smaller of a pair of successive powerful numbers (A001694) without any prime number between them.at n=26A240591
• Prime powers (p^k, p prime, k >= 1) such that k*p^k - 1 is also a power of a prime.at n=39A263581