OFFSET
0,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..200
Paul Leyland, Factors of Cullen and Woodall numbers
Paul Leyland, Generalized Cullen and Woodall numbers
Amelia Carolina Sparavigna, The groupoids of Mersenne, Fermat, Cullen, Woodall and other Numbers and their representations by means of integer sequences, Politecnico di Torino, Italy (2019), [math.NT].
Amelia Carolina Sparavigna, Some Groupoids and their Representations by Means of Integer Sequences, International Journal of Sciences (2019) Vol. 8, No. 10.
FORMULA
G.f.: (1-6*x+28*x^2-32*x^3)/((1-x)*(1-4*x)^2). [Colin Barker, Apr 22 2012]
MATHEMATICA
CoefficientList[Series[(1 - 6 x + 28 x^2 - 32 x^3)/((1 - x) (1 - 4 x)^2), {x, 0, 21}], x] (* Michael De Vlieger, Jan 04 2020 *)
PROG
(PARI) { for (n=0, 200, write("b060416.txt", n, " ", abs(n*4^n - 1)); ) } \\ Harry J. Smith, Jul 04 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jason Earls, Apr 05 2001
STATUS
approved