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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A316723 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j=1..k} (1+x^j)/(1-x^j). 4
1, 1, 0, 1, 2, 0, 1, 2, 2, 0, 1, 2, 4, 2, 0, 1, 2, 4, 6, 2, 0, 1, 2, 4, 8, 8, 2, 0, 1, 2, 4, 8, 12, 10, 2, 0, 1, 2, 4, 8, 14, 18, 12, 2, 0, 1, 2, 4, 8, 14, 22, 26, 14, 2, 0, 1, 2, 4, 8, 14, 24, 34, 34, 16, 2, 0, 1, 2, 4, 8, 14, 24, 38, 50, 44, 18, 2, 0, 1, 2, 4, 8, 14, 24, 40, 58, 70, 56, 20, 2, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Seiichi Manyama, Antidiagonals n = 0..139, flattened

EXAMPLE

Square array begins:

   1, 1,  1,  1,  1,  1,  1, ...

   0, 2,  2,  2,  2,  2,  2, ...

   0, 2,  4,  4,  4,  4,  4, ...

   0, 2,  6,  8,  8,  8,  8, ...

   0, 2,  8, 12, 14, 14, 14, ...

   0, 2, 10, 18, 22, 24, 24, ...

   0, 2, 12, 26, 34, 38, 40, ...

CROSSREFS

Columns k=0-10 give: A000007, A040000, A004277, A053799, A053798, A053800, A053801, A053802, A069251, A069252, A069253.

Diagonal gives A015128.

Sequence in context: A284749 A062169 A113680 * A128187 A266477 A133121

Adjacent sequences:  A316720 A316721 A316722 * A316724 A316725 A316726

KEYWORD

nonn,tabl

AUTHOR

Seiichi Manyama, Jul 11 2018

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 16 03:15 EDT 2019. Contains 328038 sequences. (Running on oeis4.)