OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
FORMULA
G.f. ( -1-2*x^2+2*x^3-x^4-2*x^6+x^5-x^8+x^9 ) / ( (x^2+1)*(1+x+x^2)*(x^4-x^2+1)*(x-1)^3 ). - R. J. Mathar, Oct 31 2011
a(n) = floor(1/12 n (3 n^2 + 23 n + 46)/(n + 4)). - Ivan Neretin, May 21 2018
MATHEMATICA
Table[Floor[1/12 n (3 n^2 + 23 n + 46)/(n + 4)], {n, 44}] (* Ivan Neretin, May 21 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved