The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A196486 Irregular triangle 3^n-2^m. 2
1, 7, 5, 1, 25, 23, 19, 11, 79, 77, 73, 65, 49, 17, 241, 239, 235, 227, 211, 179, 115, 727, 725, 721, 713, 697, 665, 601, 473, 217, 2185, 2183, 2179, 2171, 2155, 2123, 2059, 1931, 1675, 1163, 139, 6559, 6557, 6553, 6545, 6529, 6497, 6433, 6305, 6049, 5537 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Each n-th row consists of A056576(n) terms, the first term is 3^n-2, n-th term is 3^n-2^n=A001047(n), and the last term is A056577(n).
T(n,k) = A227048(n,A056576(n)-k) for k = 1..A056576(n). - Reinhard Zumkeller, Jun 30 2013
LINKS
EXAMPLE
Rows are:
n=1: 1
n=2: 7,5,1
n=3: 25,23,19,11
n=4: 79,77,73,65,49,17
n=5: 241,239,235,227,211,179,115.
MATHEMATICA
Flatten[Table[3^k - 2^m, {k, 10}, {m, Floor[Log[2, 3^k]]}]]
PROG
(Haskell)
a196486 n k = a196486_tabf !! (n-1) !! (k-1)
a196486_row n = a196486_tabf !! (n-1)
a196486_tabf = map (tail . reverse) $ tail a227048_tabf
-- Reinhard Zumkeller, Jun 30 2013
CROSSREFS
Sequence in context: A330156 A323811 A316334 * A216853 A272169 A084911
KEYWORD
nonn,tabf
AUTHOR
Zak Seidov, Oct 03 2011
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 21 00:58 EDT 2024. Contains 372720 sequences. (Running on oeis4.)