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A196346 A quintisection of A196344. 3
1, 1, -2, 1, -1, 0, 0, 1, -2, -1, -2, 1, 0, 2, -1, 0, 2, 0, -1, 1, -1, -1, 2, -1, 2, -1, 2, -1, 2, -1, 2, 0, -2, 0, 0, -2, 2, -2, -1, 0, -1, 2, -1, -2, 1, -2, 1, 2, -2, 0, 2, 2, 1, 0, -2, -1, -2, -2, 0, 2, 2, 1, 1, 1, 2, 1, -1, 2, 1, -1, 1, 0, 2, 2, -1, 2, -1, 1, -1, -2, -1, 1, -1, -1, -1, 1, 2, 0, -2, 0, 1, 2, 1, 2, -2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Paul D. Hanna, Table of n, a(n) for n = 0..200

EXAMPLE

G.f.: A(x) = 1 + x - 2*x^2 + x^3 - x^4 + x^7 - 2*x^8 - x^9 - 2*x^10 + x^11 + 2*x^13 - x^14 + 2*x^16 - x^18 + x^19 - x^20 +...

where the following series consists entirely of integer coefficients:

(A(x^5) + 5*x)^(1/5) = 1 + x - 2*x^2 + 6*x^3 - 21*x^4 + 80*x^5 - 320*x^6 + 1326*x^7 - 5637*x^8 + 24434*x^9 - 107542*x^10 +...+ A196345(n)*x^n +...

PROG

(PARI) {a(n)=local(A=1+5*x); if(n==0, 1, for(j=1, 5*n, for(k=-2, 2, t=polcoeff((A+k*x^j+x*O(x^j))^(1/5), j);

if(denominator(t)==1, A=A+k*x^j; break))); polcoeff(A+x*O(x^(5*n)), 5*n))}

CROSSREFS

Cf. A196344, A196345.

Sequence in context: A232442 A107110 A061197 * A261884 A035178 A093829

Adjacent sequences:  A196343 A196344 A196345 * A196347 A196348 A196349

KEYWORD

sign

AUTHOR

Paul D. Hanna, Oct 01 2011

STATUS

approved

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Last modified November 20 20:43 EST 2019. Contains 329347 sequences. (Running on oeis4.)