7208960

Appears in sequences

• a(0)=2, a(1)=7, and a(n) = (3*n+1)*2^(n-1) if n > 1.at n=18A176662
• Expand the real root of y^3 - y + x in powers of x, then multiply coefficient of x^n by -4^n to get integers.at n=9A206300
• Expansion of x / Series_Reversion(x*sqrt(1 + 4*x)).at n=9A224884
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 870", based on the 5-celled von Neumann neighborhood.at n=22A290625
• a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.at n=34A365679
• Fixed points of map n -> A366275(n).at n=39A366277