28830

Appears in sequences

• Expansion of Product_{m>=1} (1+x^m)^2.at n=33A022567
• a(n) = n^3 - n^2.at n=31A045991
• a(n) = n^2 * phi(n).at n=30A053191
• Low-temperature partition function expansion for Kagome net (Potts model, q=3).at n=16A057401
• Numbers k such that 6*k+1, 6*k+7, 6*k+13, 6*k+19 are consecutive primes.at n=27A090839
• a(n) = sigma_3(n) - sigma_2(n).at n=30A092349
• a(n) = n*(n+1)^2.at n=29A114364
• Number of 2 X 2 symmetric matrices over Z(n) having nonzero determinant.at n=30A115077
• Minimal m > 0 such that Fibonacci(m) == 0 (mod n^3).at n=30A132633
• a(n) = p^2*(p-1), where p = prime(n).at n=10A135177
• a(p^n)=p^(n+1)(p-1) if p is prime and a(nm)=lcm(a(n),a(m)) if gcd(n,m)=1.at n=30A236563
• a(n) = 30*n^2.at n=31A244636
• The least positive integer in A055744 divisible by A008578(n).at n=11A256430
• Numbers A055744(n) such that for any k < n, A055744(k) and A055744(n) do not have all their prime factors in common.at n=17A256431
• Number of (5+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=14A258558
• Duplicate of A090839.at n=27A296055
• Euler phi function applied to the cubefull exponentially odd numbers (A335988).at n=39A371414
• a(n) is the area of the rectangle whose edges are n and A375673(n).at n=28A375675
• Record values in A377059.at n=45A378029
• The Euler totient of the smallest cube divisible by n.at n=30A390754