login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A126064 Triangle read by rows, obtained by multiplying columns of triangle in A094587 by 1,2,4,8,16,... respectively. 1
1, 1, 2, 2, 4, 4, 6, 12, 12, 8, 24, 48, 48, 32, 16, 120, 240, 240, 160, 80, 32, 720, 1440, 1440, 960, 480, 192, 64, 5040, 10080, 10080, 6720, 3360, 1344, 448, 128, 40320, 80640, 80640, 53760, 26880, 10752, 3584, 1024, 256, 362880, 725760, 725760 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Also obtained by multiplying the n-th rows of A094587 by the first (n+1) powers of 2: T(n,k) = A094587(n,k) * A059268(n,k), 0 <= k <= n. - Reinhard Zumkeller, Jul 05 2012

LINKS

Reinhard Zumkeller, Rows n = 0..150 of triangle, flattened

P. Luschny, Variants of Variations.

EXAMPLE

1

1, 2

2, 4, 4

6, 12, 12, 8

24, 48, 48, 32, 16

120, 240, 240, 160, 80, 32

720, 1440, 1440, 960, 480, 192, 64

5040, 10080, 10080, 6720, 3360, 1344, 448, 128

MAPLE

A126064 := proc(n, k) binomial(n, k)*(n-k)!*2^k ; end: for n from 0 to 13 do for k from 0 to n do printf("%d, ", A126064(n, k)) ; od: od: # R. J. Mathar, Nov 02 2007

PROG

(Haskell)

a126064 n k = a126064_tabl !! n !! k

a126064_row n = a126064_tabl !! n

a126064_tabl =  zipWith (zipWith (*)) a094587_tabl a059268_tabl

-- Reinhard Zumkeller, Jul 05 2012

CROSSREFS

Sequence in context: A131733 A128745 A188524 * A066813 A033732 A033752

Adjacent sequences:  A126061 A126062 A126063 * A126065 A126066 A126067

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane, Feb 28 2007

EXTENSIONS

More terms from R. J. Mathar, Nov 02 2007

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified September 22 00:25 EDT 2017. Contains 292326 sequences.