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A091949 a(n) = A087659(n) mod 2. 0
1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..104.

FORMULA

a(n)=hypergeom([ -n, (n+4)/2, (n+5)/2], [3, 2], -4) mod 2; a(8k)=1, a(8k+1)=0, a(8k+2)=1 a(8k+3)=0, a(8k+4)=0, a(8k+5)= 035263(k+1), a(8k+6)=1-035263(k+1), a(8k+7)=A035263(k+1)

PROG

(PARI) a(n)= sum(i=0, n, 2*binomial(n, i)*(n+2*i+3)!/((i+1)!*(i+2)!*(n+3)!))%2

CROSSREFS

Sequence in context: A181656 A090971 A105594 * A039984 A153639 A319102

Adjacent sequences:  A091946 A091947 A091948 * A091950 A091951 A091952

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Mar 11 2004

STATUS

approved

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Last modified April 7 00:54 EDT 2020. Contains 333291 sequences. (Running on oeis4.)