1196836

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=14A001998
• n in base 8 is a palindromic square.at n=21A029806
• a(n) = (3^n + 1)^2/4.at n=7A051500
• 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=13A221276
• Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.at n=5A257358
• Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.at n=4A257359
• Perfect powers that are the sum of two distinct proper prime powers (A246547).at n=24A282550
• 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=14A382171