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A238055 a(n) = (13*3^n-1)/2. 1
6, 19, 58, 175, 526, 1579, 4738, 14215, 42646, 127939, 383818, 1151455, 3454366, 10363099, 31089298, 93267895, 279803686, 839411059, 2518233178, 7554699535, 22664098606, 67992295819, 203976887458, 611930662375, 1835791987126, 5507375961379, 16522127884138 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..26.

FORMULA

a(n) = 3*a(n-1) + 1, a(0)=6.

a(n) = 4*a(n-1) - 3*a(n-2), a(0)=6, a(1)=19.

a(n) = 2*A237930(n) - A003462(n).

a(n) = A052909(n+1) + A000244(n).

a(n) = A237930(n) + A000244(n+1).

a(n) = 13*A003462(n) + 6.

G.f.: (6-5*x)/((1-x)*(1-3*x)).

EXAMPLE

Ternary....................Decimal

20...............................6

201.............................19

2011............................58

20111..........................175

201111.........................526

2011111.......................1579

20111111......................4738

201111111....................14215, etc.

CROSSREFS

Cf. A000244, A003462, A052909, A060816, A237930.

Sequence in context: A286184 A027044 A057571 * A272227 A272587 A125069

Adjacent sequences:  A238052 A238053 A238054 * A238056 A238057 A238058

KEYWORD

nonn,easy

AUTHOR

Philippe Deléham, Feb 17 2014

STATUS

approved

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Last modified June 18 04:41 EDT 2021. Contains 345098 sequences. (Running on oeis4.)