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A249307 Triangle read by rows: A249095(n,k) * 2^k, k = 0 .. 2*n+1. 5
1, 1, 2, 4, 1, 2, 8, 8, 16, 1, 2, 12, 16, 48, 32, 64, 1, 2, 16, 24, 96, 96, 256, 128, 256, 1, 2, 20, 32, 160, 192, 640, 512, 1280, 512, 1024, 1, 2, 24, 40, 240, 320, 1280, 1280, 3840, 2560, 6144, 2048, 4096, 1, 2, 28, 48, 336, 480, 2240, 2560, 8960, 7680 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Length of row n = 2*n+1;
T(n,2*n+1) = 4^n = A000302(n);
for n > 0: sum of row n = 7*5^(n-1), cf. A005055.
LINKS
PROG
(Haskell)
a249307 n k = a249307_tabf !! n !! k
a249307_row n = a249307_tabf !! n
a249307_tabf = map (zipWith (*) a000079_list) a249095_tabf
CROSSREFS
Cf. A249095, A000079, A005408 (row lengths), A249308 (central terms), A000302 (right edge), A005055 (row sums, except for initial 1), A013609.
Cf. A013609.
Sequence in context: A364837 A333651 A131398 * A209581 A342053 A050980
KEYWORD
nonn,tabf
AUTHOR
Reinhard Zumkeller, Nov 14 2014
STATUS
approved

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Last modified July 20 15:15 EDT 2024. Contains 374459 sequences. (Running on oeis4.)