96864964

Appears in sequences

• Bending a piece of wire of length n+1; walks of length n+1 on a tetrahedron; also non-branched catafusenes with n+2 condensed hexagons.at n=18A001998
• a(n) = (3^n + 1)^2/4.at n=9A051500
• Legendre-binomial transform of 3^n for p=3.at n=17A117977
• Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=17A221276
• a(0) = 0; for n >= 1, one quarter of the number of points on the elliptic curve y^2 = x^3 - x defined over GF(3^n).at n=18A382171