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A174927 Periodic sequence: Repeat 1, 64. 3
1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64, 1, 64 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Interleaving of A000012 and 2*A010871.

Also continued fraction expansion of (4+sqrt(17))/8.

First differences of A174928.

LINKS

Table of n, a(n) for n=0..83.

FORMULA

a(n) = (65-63*(-1)^n)/2.

a(n) = a(n-2) for n > 1; a(0) = 0, a(1) = 64.

a(n) = -a(n-1)+65 for n > 0; a(0) = 1.

a(n) = ((n+1) mod 2)+64*(n mod 2).

G.f.: (1+64*x)/((1-x)*(1+x)).

MATHEMATICA

PadRight[{}, 100, {1, 64}] (* Harvey P. Dale, Jun 16 2013 *)

PROG

(MAGMA) &cat[ [1, 64]: n in [0..41] ];

[ (65-63*(-1)^n)/2: n in [0..83] ];

CROSSREFS

Cf. A000012 (all 1's sequence), A010871 (all 32's sequence), A010689 (repeat 1, 8), A174930 (decimal expansion of (4+sqrt(17))/8), A174928.

Sequence in context: A221761 A085339 A203262 * A303329 A301911 A302155

Adjacent sequences:  A174924 A174925 A174926 * A174928 A174929 A174930

KEYWORD

cofr,easy,nonn

AUTHOR

Klaus Brockhaus, Apr 02 2010

STATUS

approved

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Last modified September 19 20:55 EDT 2020. Contains 337182 sequences. (Running on oeis4.)