45368

Appears in sequences

• Numbers k such that phi(k) + 2 | sigma(k + 2).at n=27A015781
• a(n) = Sum_{k >= 1} floor(3*tau^(n-k)).at n=18A020958
• Triangle read by rows: number of labeled partitions of n with maximin m.at n=59A113547
• a(0)=1. a(n) = a(n-1)*(n+1), if n is in the sequence. a(n)= a(n-1) +1, if n is missing from the sequence.at n=17A118471
• a(n) = 4*(3*n+1)*(3*n+2).at n=35A144410
• Number of length 3+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=13A253131
• Bases b for which there exists an integer y such that y^2 in base b consists of 4 identical digits.at n=7A290204
• Triangle read by rows: T(n,m), n >= 1, 1 <= m <= n, is number of partitions of the set {1,2,...,n} that have at most one block contained in {1,...,m}.at n=50A362924
• Triangle read by rows: T(n,m), n >= 0, 0 <= m <= n, is number of partitions of the set {1,2,...,n} that have at most one block contained in {1,...,m}.at n=61A362925
• Triangle read by rows: A113547 without its main diagonal.at n=49A362926
• Sums of distinct factorials that are of the form x^2 - 1.at n=8A363212
• a(1) = 1, a(n) = n*(n-2)! + n - 1.at n=8A372255
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, x_2, x_3, n)^4.at n=11A372929