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A304577 Period 21: repeat (0,0,0,0,1,1,1,1,1,0,1,0,1,0,0,1,1,0,0,0,1). 0
0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0

LINKS

Table of n, a(n) for n=0..83.

Michael R. Bush and Danjoseph Quijada, Period sets of linear recurrence over finite fields and related commutative rings, arXiv:1805.03238 [math.NT], 2018 (see Remark 3.7, page 13).

FORMULA

G.f.: x^4*(1+x+x^2+x^3+x^4+x^6+x^8+x^11+x^12+x^16)/(1-x^21).

a(n) = a(n-21) for n >= 21.

MATHEMATICA

CoefficientList[Series[(x^4 (1 + x + x^2 + x^3 + x^4 + x^6 + x^8 + x^11 + x^12 + x^16))/(1 - x^21), {x, 0, 100}], x]

PROG

(MAGMA) &cat[[0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1]^^4];

CROSSREFS

Sequence in context: A011663 A091247 A085137 * A194670 A130543 A193243

Adjacent sequences:  A304574 A304575 A304576 * A304578 A304579 A304580

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, May 15 2018

STATUS

approved

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Last modified September 23 09:03 EDT 2020. Contains 337298 sequences. (Running on oeis4.)