0,2

The initial terms coincide with those of A003950, although the two sequences are eventually different.

Computed with MAGMA using commands similar to those used to compute A154638.

Table of n, a(n) for n=0..19.

Index entries for linear recurrences with constant coefficients, signature (6, 6, 6, -21).

G.f.: (t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(21*t^4 - 6*t^3 - 6*t^2 - 6*t + 1)

Sequence in context: A214942 A010556 A010575 * A063812 A234274 A163347

Adjacent sequences: A162946 A162947 A162948 * A162950 A162951 A162952

nonn

John Cannon and N. J. A. Sloane, Dec 03 2009

approved