26181

Appears in sequences

• a(n) = n^4 - n^3 - n^2 - n - 1.at n=13A125082
• Numerators of partial sums for a series for Pi/(3*sqrt(3)).at n=12A128500
• Array read by antidiagonals: T(0,m)=2, T(1,m)=1, T(n,m)=A000032(n) and recursively T(n,m)=( T(n-1,m)^2 + (4*m + 1)*(-1)^n) / T(n-2, m), n>=0, m>=1.at n=47A178030
• Centered 44-gonal numbers.at n=34A195318
• Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths ending at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 6, n >= 2.at n=39A213070
• Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths ending at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 7, n >= 2.at n=34A214373
• a(n) = (2 * a(n-3) + a(n-1) * a(n-5)) / a(n-6), a(0) = a(1) = ... = a(5) = 1.at n=20A275175
• Number of ways to write n as an ordered sum of 6 prime power palindromes (A084092).at n=34A282845
• a(n) is the sum of all peaks in the set of Catalan words of length n.at n=10A371965
• Triangular array T(n,k) read by rows, satisfies A377441(n, k+2) = Sum_{m=0..k} T(k, m)*n^m.at n=37A377443