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A094547 A019309(n)/4 for n >= 1. 1
1, 3, 12, 45, 180, 708, 2832, 11283, 45132, 180348, 721392, 2884860, 11539440, 46154928, 184619712, 738467565, 2953870260, 11815435908, 47261743632, 189046794180, 756187176720, 3024747985488, 12098991941952, 48395964882948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..24.

FORMULA

a(2n+1) = 4*a(2n); a(2n) = 4*a(2n-1)-a(n). - David Wasserman, May 22 2007

CROSSREFS

Sequence in context: A114515 A192467 A151162 * A026559 A188949 A184699

Adjacent sequences:  A094544 A094545 A094546 * A094548 A094549 A094550

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jun 06 2004

EXTENSIONS

More terms from David Wasserman, May 22 2007

STATUS

approved

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Last modified January 23 10:50 EST 2020. Contains 331171 sequences. (Running on oeis4.)