725594112

Appears in sequences

• Number of primitive polynomials of degree n over GF(2) (version 2).at n=35A000020
• Numbers that are the sum of 2 positive 11th powers.at n=20A004813
• Number of primitive polynomials of degree n over GF(2).at n=35A011260
• Ratios of successive terms are 2, 3, 2, 3, 2, 3, 2, 3, ...at n=23A026549
• a(n) = phi(4^n-1)/(2*n).at n=17A027742
• Coefficients of the highest power of r in a sequence of parametric solutions for the Diophantine equation x^3+y^3+z^3=1.at n=4A058200
• Ninth column of triangle A067425.at n=6A067429
• a(n) = n*(n-1)*6^n.at n=9A128800
• a(n) = phi(6^n).at n=12A167747
• For an integer k with prime factorization p_1*p_2*p_3* ... *p_m let k* = (p_1+1)*(p_2+1)*(p_3+1)* ... *(p_m+1); sequence gives k* such that k* is divisible by k.at n=30A380574
• Numbers of the form P(k)^m * Q(k), k > 1, m >= 0, with P(k) = Product_{i=1..k} prime(i) = A002110(k) and Q(k) = Product_{j=1..k} P(j) = A006939(k).at n=18A387492
• Numbers of the form P(k)^m * Q(k), k > 1, m >= 1, with P(k) = Product_{i=1..k} prime(i) = A002110(k) and Q(k) = Product_{j=1..k} P(j) = A006939(k).at n=14A387493