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A144464 Triangle T(n,m) read by rows: T(n,m) = 2^min(m,n-m). 8
1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 4, 2, 1, 1, 2, 4, 4, 2, 1, 1, 2, 4, 8, 4, 2, 1, 1, 2, 4, 8, 8, 4, 2, 1, 1, 2, 4, 8, 16, 8, 4, 2, 1, 1, 2, 4, 8, 16, 16, 8, 4, 2, 1, 1, 2, 4, 8, 16, 32, 16, 8, 4, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
FORMULA
Row sums: sum_{m=0..n} T(n,m) = A027383(n).
T(n,k) = 2^A004197(n,k). - Philippe Deléham, Feb 25 2014
EXAMPLE
The triangle starts in row n=0 as:
{1},
{1, 1},
{1, 2, 1},
{1, 2, 2, 1},
{1, 2, 4, 2, 1},
{1, 2, 4, 4, 2, 1},
{1, 2, 4, 8, 4, 2, 1},
{1, 2, 4, 8, 8, 4, 2, 1},
{1, 2, 4, 8, 16, 8, 4, 2, 1},
{1, 2, 4, 8, 16, 16, 8, 4, 2, 1},
{1, 2, 4, 8, 16, 32, 16, 8, 4, 2, 1}
MATHEMATICA
Clear[f, t]; f[n_, m_] = If[m <= Floor[n/2], m, n - m]; Table[Table[f[n, m], {m, 0, n}], {n, 0, 10}]; Flatten[%]
PROG
(PARI) T(n, m)=1<<min(m, n-m) \\ Charles R Greathouse IV, Jan 15 2012
CROSSREFS
Sequence in context: A320747 A348690 A238392 * A138015 A327742 A103444
KEYWORD
nonn,easy,tabl
AUTHOR
EXTENSIONS
Offset corrected by the Associate Editors of the OEIS, Sep 11 2009
Better name by Philippe Deléham, Feb 25 2014
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)