0,2

Partial sums of A084103.

a(n)=1/30*{8*(n mod 6)+23*[(n+1) mod 6]+23*[(n+2) mod 6]+8*[(n+3) mod 6]-7*[(n+4) mod 6]-7*[(n+5) mod 6]} - Paolo P. Lava (ppl(AT)spl.at), Oct 20 2006

Euler transform of length 6 sequence [ 4, -3, -1, 0, 0, 1]. - Michael Somos Nov 07 2006

G.f.: (1+x)^3/((1-x)(1+x^3)).

(PARI) {a(n)=[1, 4, 7, 7, 4, 1][n%6+1]}

Cf. A084101, A007877.

Sequence in context: A097916 A086775 A132266 this_sequence A093582 A075113 A011222

Adjacent sequences: A084101 A084102 A084103 this_sequence A084105 A084106 A084107

easy,nonn

Paul Barry (pbarry(AT)wit.ie), May 15 2003