18605

Appears in sequences

• a(n) = (5*n + 1)^2 + 4*n + 1.at n=27A007533
• Numbers n such that n | 7^n + 6^n + 5^n + 4^n + 3^n.at n=12A057255
• Numbers k such that k | 6^k + 5^k + 4^k + 3^k + 2^k.at n=28A057256
• Number of Fibonacci binary words of length n having no 0110 subword. A Fibonacci binary word is a binary word having no 00 subword.at n=23A130137
• a(n) = 25*n^2 - 36*n + 13.at n=28A154355
• Integers of the form A164577(k)/3.at n=29A164619
• Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined at Comments.at n=14A193049
• Triangle read by rows, T(n,k) = Sum_{j=0..n-k+1} P(n,j)*T(n-j,k-1) if k>0 else 0^n where P(n,j) is the number of j-partitions of n; for n>=0 and 0<=k<=n.at n=59A257566
• Number of integer partitions of n such that every orderless pair of distinct parts has a different sum.at n=40A325857
• Numbers of the form p^2*q, with odd primes p > q, such that q divides p-1.at n=15A350638
• Numerators of the partial sums of the reciprocals of the alternating sum of divisors function (A206369).at n=41A379619
• Numbers k such that sigma(k) = psi(k) + tau(k).at n=31A387953