58081

Appears in sequences

• a(n) = (6*n + 1)^2.at n=40A016922
• a(n) = (8*n + 1)^2.at n=30A017078
• a(n) = (9*n + 7)^2.at n=26A017246
• a(n) = (10*n + 1)^2.at n=24A017282
• a(n) = (11*n + 10)^2.at n=21A017510
• a(n) = (12*n + 1)^2.at n=20A017534
• Strong pseudoprimes to base 94.at n=20A020320
• Squares which are palindromes in base 15.at n=16A030075
• a(n+1) is smallest square > a(n) having no digits in common with a(n), with a(0) = 0.at n=24A030288
• Square numbers that are concatenations of two or more prime numbers.at n=39A038692
• Squares with initial digit '5'.at n=26A045788
• Composite numbers k such that sigma(k) / d(k) is prime.at n=31A048969
• Powers of a prime lucky number (A031157) but excluding lucky numbers (A000959).at n=20A057609
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=16A058031
• Numbers n such that sigma(d(n^3))==d(sigma(n^2)), where d(n) is the number of divisors of n.at n=18A063797
• Square of primes of the form 4k+1 (A002144).at n=23A080109
• Sum of legs of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse.at n=29A089552
• Squares of A006450: a(n) = prime(prime(n))^2.at n=15A092769
• Powers of 3-Step Lucas numbers (A001644).at n=37A105949
• Expansion of g.f. -(1+27*x^2)/((1+3*x)*(1-2*x+9*x^2)).at n=9A106632