A267184 Row 4 of the square array in A267181.

1, 4, 2, 5, 0, 5, 3, 6, 1, 6, 4, 7, 2, 7, 5, 8, 3, 8, 6, 9, 4, 9, 7, 10, 5, 10, 8, 11, 6, 11, 9, 12, 7, 12, 10, 13, 8, 13, 11, 14, 9, 14, 12, 15, 10, 15, 13, 16, 11, 16, 14, 17, 12, 17, 15, 18, 13, 18, 16, 19, 14, 19, 17, 20, 15, 20, 18, 21, 16, 21, 19, 22, 17, 22, 20, 23, 18, 23, 21, 24, 19

Offset

0,2

Links

Table of n, a(n) for n=0..80.

Formula

Conjectures from Colin Barker, Jan 29 2016: (Start)

a(n) = a(n-1)+a(n-4)-a(n-5) for n>5.

G.f.: (1+3*x-2*x^2+3*x^3-6*x^4+2*x^5) / ((1-x)^2*(1+x)*(1+x^2)).

(End)

Crossrefs

Cf. A267181.

Sequence in context: A348640 A094099 A107046 * A275927 A072907 A250719

Adjacent sequences: A267181 A267182 A267183 * A267185 A267186 A267187

Keyword

nonn

Author

N. J. A. Sloane, Jan 17 2016

Status

approved