0,2

a(n)=2(a(n-1)+3^n)+n-1, a(0)=1

a(n)=2*3^(n+1)-2^(n+2)-n-1 - Benoit Cloitre (benoit7848c(AT)orange.fr), May 23 2004

(PARI) a(n)=2*3^(n+1)-2^(n+2)-n-1

Cf. A094615.

Sequence in context: A040977 A036598 A059824 this_sequence A114569 A098999 A000426

Adjacent sequences: A094613 A094614 A094615 this_sequence A094617 A094618 A094619

nonn

Clark Kimberling (ck6(AT)evansville.edu), May 14 2004