42850116

Appears in sequences

• a(n) = 3^n - 3*2^n + 3.at n=16A001117
• Number of palindromes of length n using exactly three different symbols.at n=30A056454
• Number of palindromes of length n using exactly three different symbols.at n=31A056454
• Number of primitive (aperiodic) palindromes using exactly three different symbols.at n=30A056464
• Number of periodic palindromes using exactly three different symbols.at n=30A056489
• Number of primitive (period n) periodic palindromes using exactly three different symbols.at n=30A056499
• A(k,3) where A(k,n) = Sum_{m=1..k} (-1)^(m+1) *binomial(n,m)*m^k.at n=15A179483