A059162 A hierarchical sequence (S(W'2{3}*c) - see A059126).

12, 48, 144, 384, 960, 2304, 5376, 12288, 27648, 61440, 135168, 294912, 638976, 1376256, 2949120, 6291456, 13369344, 28311552, 59768832, 125829120, 264241152, 553648128, 1157627904, 2415919104, 5033164800, 10468982784, 21743271936, 45097156608, 93415538688

Offset

0,1

Links

Colin Barker, Table of n, a(n) for n = 0..1000

J. Wallgren, Hierarchical sequences

Index entries for linear recurrences with constant coefficients, signature (4,-4).

Formula

a(n) = 12*A001787(n).

From Colin Barker, Oct 07 2015: (Start)

a(n) = 3*(2^(2+n)*(1+n)).

a(n) = 4*a(n-1)-4*a(n-2) for n>1.

G.f.: 12 / (2*x-1)^2.

(End)

Prog

(PARI) Vec(12/(2*x-1)^2 + O(x^40)) \\ Colin Barker, Oct 07 2015

Crossrefs

Sequence in context: A239352 A292022 A265040 * A333032 A190622 A117027

Adjacent sequences: A059159 A059160 A059161 * A059163 A059164 A059165

Keyword

easy,nonn

Author

Jonas Wallgren, Feb 02 2001

Status

approved