61215
domain: N
Appears in sequences
- Odd numbers with exactly 5 distinct prime factors.at n=30A046391
- Numbers n such that the middle coefficient of the cyclotomic polynomial Phi_n(x) has a value not obtained for any smaller n.at n=30A095877
- Odd squarefree abundant numbers.at n=22A112643
- Odd unitary abundant numbers.at n=22A129485
- Beginning of a run of 4 consecutive Niven (or Harshad) numbers.at n=16A141769
- Products of 5 distinct primes a,b,c,d,e, such that a+b+c+d+e are prime numbers.at n=8A178782
- Number of strings of numbers x(i=1..n) in 0..6 with sum i*x(i)^3 equal to n*216.at n=9A184717
- Triangle T(n,k) represents the coefficients of (x^11*d/dx)^n, where n=1,2,3,...at n=11A223513
- Numbers k such that k^2 +- k +- 1 is prime for all four possibilities.at n=14A236056
- Number of partitions of n such that m(greatest part) < m(1), where m = multiplicity.at n=45A240076
- Primitive, odd, squarefree abundant numbers.at n=22A249263
- Squarefree primitive abundant numbers (first definition: having only deficient proper divisors).at n=44A298973
- Odd non-coreful abundant numbers: the odd terms of A308127.at n=22A339938
- Odd nonexponential abundant numbers: odd numbers k such that A160135(k) > k.at n=36A348605
- Odd numbers k such that A360522(k) > 2*k.at n=22A360526
- Odd modified exponential abundant numbers: odd numbers k such that A241405(k) > 2*k.at n=22A379031