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A267183 Row 3 of the square array in A267181. 0
1, 3, 4, 0, 4, 5, 1, 5, 6, 2, 6, 7, 3, 7, 8, 4, 8, 9, 5, 9, 10, 6, 10, 11, 7, 11, 12, 8, 12, 13, 9, 13, 14, 10, 14, 15, 11, 15, 16, 12, 16, 17, 13, 17, 18, 14, 18, 19, 15, 19, 20, 16, 20, 21, 17, 21, 22, 18, 22, 23, 19, 23, 24, 20, 24, 25, 21, 25, 26, 22, 26, 27, 23, 27, 28, 24, 28, 29, 25, 29, 30 (list; graph; refs; listen; history; text; internal format)
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-3)-a(n-4) for n>4.

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

CROSSREFS

Cf. A267181.

Sequence in context: A110061 A220956 A294967 * A021750 A246770 A197809

Adjacent sequences:  A267180 A267181 A267182 * A267184 A267185 A267186

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 17 2016

STATUS

approved

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Last modified January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)