0,2

A014493(n+1) = A000217(a(n)); complement of A014601. - Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Oct 04 2004

G.f.: (1+x+2*x^2)/((1-x)*(1-x^2)). a(n)=a(n-1)+2+(-1)^n, a(0)=1 - Michael Somos, Jan 12 2000.

a(n)=sum{k=0..n, mod(A001045(k), 4) } - Paul Barry (pbarry(AT)wit.ie), Mar 12 2004

(PARI) a(n)=1+2*n-n%2

A042963(n)=1+A042948(n).

Sequence in context: A031461 A085183 A133759 this_sequence A000277 A003664 A065890

Adjacent sequences: A042960 A042961 A042962 this_sequence A042964 A042965 A042966

nonn

njas