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A020523 a(n) = 3rd Euler polynomial evaluated at 2^n and multiplied by 4. 6
-1, 9, 161, 1665, 14849, 124929, 1024001, 8290305, 66715649, 535298049, 4288675841, 34334572545, 274777243649, 2198620602369, 17590575431681, 140731045904385, 1125874137038849, 9007096175525889, 72057181721067521, 576459103035981825 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) = 4*8^n - 6*4^n + 1.
a(n) = 13*a(n-1)-44*a(n-2)+32*a(n-3) for n>2. - Colin Barker, May 04 2015
G.f.: -(22*x-1) / ((x-1)*(4*x-1)*(8*x-1)). - Colin Barker, May 04 2015
MAPLE
seq(euler(3, 2^i), i=0..24);
MATHEMATICA
Table[EulerE[3, 2^n], {n, 0, 40}]*4 (* Vladimir Joseph Stephan Orlovsky, Nov 03 2009 *)
PROG
(PARI) Vec(-(22*x-1)/((x-1)*(4*x-1)*(8*x-1)) + O(x^100)) \\ Colin Barker, May 04 2015
CROSSREFS
Sequence in context: A327978 A062232 A337627 * A023039 A243682 A367160
KEYWORD
sign,easy
AUTHOR
STATUS
approved

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Last modified March 19 03:17 EDT 2024. Contains 370952 sequences. (Running on oeis4.)