OFFSET
0,3
LINKS
E. Angelini, k-chunks sum and division by k, post to the SeqFan list, Mar 22 2013
Index entries for linear recurrences with constant coefficients, signature (0,0,0,2,0,0,0,-1).
FORMULA
a(n) = 2 a(n-4) - a(n-8).
G.f.: x*(1 + 2*x + 3*x^2 + 4*x^3 + 3*x^4 + 2*x^5 + 5*x^6)/((1 - x)*(1 + x)*(1 + x^2))^2.
a(n)=n unless n=3 (mod 4) in which case a(n)=2n-3.
PROG
(PARI) A222258(n)=if(n%4==3, n*2-3, n)
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric Angelini and M. F. Hasler, Mar 23 2013
STATUS
approved