44289

Appears in sequences

• Numbers k such that phi(k)/lambda(k) increases to a record value, where phi(k) is the Euler totient function (A000010) and lambda(k) is the Carmichael lambda function (A002322).at n=22A066605
• Sixth column (m=5) of (1,4)-Pascal triangle A095666.at n=17A095668
• Triangular matrix, read by rows, where row k is formed from the first differences of row (k-1) of its matrix square, with an appended '1' for the main diagonal.at n=38A102225
• a(n) = (11^n - 1)/(5*2^(3 - 2*(n mod 2))).at n=6A152435
• a(n) = n*(n+1)*(5*n + 4)/6.at n=37A162147
• Generalized Markoff numbers: largest of 7-tuple of positive numbers a, b, c, d, e, f, g satisfying the Markoff(7) equation a^2+b^2+c^2+d^2+e^2+f^2+g^2 = 5abcdefg.at n=25A227212
• Indices k at which record low values of the ratio A046530(k)/k occur.at n=33A330695
• Total number of parts coprime to n in the partitions of n into 8 parts.at n=49A363326
• Numbers k such that one can make an equilateral triangle from a chain of linked rods of length 1, 2, 3, ..., k, with perimeter equal to the total length.at n=38A382632