45375

Appears in sequences

• Number of walks on square lattice. Column y=4 of A052174.at n=7A005562
• a(n) = 5th Euler polynomial evaluated at 2^n and multiplied by 2.at n=3A020525
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 71.at n=2A031749
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= n/3.at n=32A048000
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n+1)/3.at n=32A048046
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n+2)/3.at n=32A048079
• 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=24A118471
• Triangular array of generalized Narayana numbers: T(n,k) = 5/(n+1)*binomial(n+1,k+4)*binomial(n+1,k-1).at n=31A145599
• Triangular array of generalized Narayana numbers: T(n,k) = 5/(n+1)*binomial(n+1,k+4)*binomial(n+1,k-1).at n=32A145599
• Numerator of Euler(n,8).at n=5A157856
• Regular triangle where T(n,k) is the number of pairs of set partitions of {1,...,n} with meet of length k.at n=38A318391
• Sociable totient numbers of order 3: numbers k such that s(s(s(k))) = k, but s(k) != k, where s(k) = A092693(k) is the sum of iterated phi function.at n=5A343243
• Numbers k such that k^(k + 1) == k + 1 (mod 2*k + 1) while 2*k+1 is not prime.at n=7A380831