OFFSET
0,6
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,2).
FORMULA
G.f.: (1+x+x^2+x^3+x^4)/(1-2*x^5).
MATHEMATICA
s[1] = {2}; s[2] = {3}; s[3] = {4}; s[4] = {5}; s[5] = {1, 6}; s[6] = {2}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] a0 = Table[Length[p[i]], {i, 0, 50}]
PROG
(PARI) a(n)=2^(n\5) \\ Charles R Greathouse IV, Oct 03 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Jun 03 2005
STATUS
approved