229320

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly ten distinct ways.at n=16A092006
• Amicable triples. Sequence gives sigma values: A125490(n) + A125491(n) + A125492(n).at n=13A137231
• Numbers with prime factorization pqr^2s^2t^3.at n=5A190386
• Non-palindromes whose squares are in A066531.at n=15A206642
• Numbers k such that k+1 is a prime, k+2 is twice a prime, k+3 is three times a prime, and k+4 is four times a prime.at n=7A278585
• Irregular triangle read by rows: T(n,k) = number of k-irredundant sets in the n X n rook graph.at n=40A290823
• Numbers n having a proper divisor d such that sigma(n) - k*d = k*n. Case k = 4.at n=20A291458
• Numbers i such that Fibonacci(i) is divisible by i, i+1, i+2, and i+3.at n=32A298685
• Numbers i such that Fibonacci(i) is divisible by i+k for k=0,1,2,3,4.at n=7A298686
• Resistance values R < 1 ohm, multiplied by a common denominator 360360 (= A338600(6)), that can be obtained from a network of exactly 6 one-ohm resistors, but not from any network with fewer than 6 one-ohm resistors.at n=15A338606
• E.g.f. satisfies A(x) = (1 - x * log(1 - x*A(x)))^2.at n=7A377685