OFFSET
0,1
COMMENTS
The corresponding left Aurifeuillian factor is A220981.
LINKS
Wikipedia, Cunningham Project
Index entries for linear recurrences with constant coefficients, signature (1555,-345210,12427560,-72550080,60466176).
FORMULA
Aurifeuillian factorization: 6^(12n+6) + 1 = (6^(4n+2) + 1) * A220981(n) * a(n).
G.f.: -(162922752*x^4-124050528*x^3+9947772*x^2-95718*x+97) / ((x-1)*(6*x-1)*(36*x-1)*(216*x-1)*(1296*x-1)). [Colin Barker, Jan 03 2013]
MATHEMATICA
Table[6^(4n+2) + 6^(3n+2) + 3 * 6^(2n+1) + 6^(n+1) + 1, {n, 0, 20}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Stuart Clary, Dec 27 2012
STATUS
approved