66050

Appears in sequences

• Numbers that are the sum of 5 nonzero 8th powers.at n=23A003383
• a(n) = 1 + a(floor(n/2))*a(ceiling(n/2)).at n=27A005468
• Numbers n such that n is a substring of its square (both n and n squared in base 4) (written in base 10).at n=39A018828
• Numbers of the form (square + 1) that are not squarefree.at n=27A124809
• a(n) = 81*n^2 - 72*n + 17.at n=29A154277
• a(n) = (n^2+1)^2+1.at n=16A178390
• Total sum of the 4th powers of lengths of ascending runs in all permutations of [n].at n=6A228994
• Expansion of Sum_{i>=1} mu(i)^2*x^i/(1 - x^i) / Product_{j>=1} (1 - mu(j)^2*x^j), where mu() is the Moebius function (A008683).at n=36A281572
• Numbers k such that the two perfect powers immediately adjacent to k^2 both have exponents greater than 2.at n=32A340643
• a(1) = 2, a(n) = k + 1, where k is the least number greater than a(n-1) such that rad(k) | a(n-1), where rad(n) = A007947(n).at n=8A365324