261626

Appears in sequences

• Nextprime(4^n)-nextprime(2^n).at n=9A037130
• J(1)*theta3(z) where J(1) is the series given by A056948.at n=9A056949
• Sequence arising from enumeration of domino tilings of Aztec Pillow-like regions.at n=11A092438
• a(n) = (1/2)*(3^n - 2^(n+1) + 3).at n=12A134063
• Triangle read by rows, coefficients of generalized Eulerian polynomials F_{4;n}(x).at n=18A292606