406224

Appears in sequences

• Least sum of 4 positive cubes in exactly n ways.at n=21A025420
• G.f.: A(x) = Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1-x^k)^(n-k+1).at n=30A206139
• Triangle of earliest friendly numbers having n friends.at n=23A211679
• Triangle of earliest friendly numbers having n friends.at n=30A211679
• Denominator of Sum_{k=1..n} 1/A045542(k).at n=9A214391
• Numbers k for which sigma(k)/k - 5/9 is an integer.at n=4A218416
• Numbers k such that A048675(sigma(k)) is equal to A048675(2*k).at n=21A331751
• Numbers k such that squarefree part of sigma(k) is equal to squarefree part of 2*k.at n=31A331752
• Numbers k for which A065330(k) = A065330(sigma(k)).at n=26A336458
• Numbers k for which sigma(k)/k = 32/9.at n=3A348148