275184

Appears in sequences

• Theta series of A_8 lattice.at n=15A008448
• Theta series of E_8 lattice with respect to midpoint of edge.at n=25A045819
• Non-palindromes in A110751; that is, non-palindromic numbers n such that n and R(n) have the same prime divisors, where R(n) = digit reversal of n.at n=29A110819
• Number of length-n 0..3 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").at n=12A215223
• Number of 2 X 2 matrices with entries in {0,1,...,n} and even trace with no entries repeated.at n=28A280056
• Numbers with exactly four distinct exponents in their prime factorization, or four distinct parts in their prime signature.at n=21A323025
• a(n) = -Sum_{k=0..n} (-1)^k * A039599(n,k)^3.at n=5A382404