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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A322426 Array read by downwards antidiagonals: A(n, k) is the k-th term of a "Look to the left" sequence starting with 1,2,...,n  (see A293630). 5
1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 1, 1, 3, 2, 1, 2, 2, 4, 3, 2, 1, 1, 1, 1, 4, 3, 2, 1, 1, 2, 2, 5, 4, 3, 2, 1, 2, 1, 3, 1, 5, 4, 3, 2, 1, 1, 2, 1, 2, 6, 5, 4, 3, 2, 1, 1, 1, 2, 3, 1, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 2, 7, 6, 5, 4, 3, 2, 1, 2, 3, 1, 1, 3, 1, 7, 6, 5 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Iain Fox, Antidiagonals n = 1..141 of array, flattened

FORMULA

If k <= n, A(n, k) = k.

EXAMPLE

| n\k |  1   2   3   4   5   6   7   8   9  10  11  12  13  ...

|-----|-----------------------------------------------------------

|  2  |  1,  2,  1,  1,  1,  2,  1,  1,  2,  1,  1,  1,  2, ...

|  3  |  1,  2,  3,  1,  2,  1,  2,  1,  2,  1,  2,  3,  1, ...

|  4  |  1,  2,  3,  4,  1,  2,  3,  1,  2,  3,  1,  2,  3, ...

|  5  |  1,  2,  3,  4,  5,  1,  2,  3,  4,  1,  2,  3,  4, ...

|  6  |  1,  2,  3,  4,  5,  6,  1,  2,  3,  4,  5,  1,  2, ...

|  7  |  1,  2,  3,  4,  5,  6,  7,  1,  2,  3,  4,  5,  6, ...

|  8  |  1,  2,  3,  4,  5,  6,  7,  8,  1,  2,  3,  4,  5, ...

| ... |

PROG

(PARI) row(n, k) = my(v=vector(n, i, i), w); while(#v<k, w=vector(#v-1, i, v[i]); for(y=1, v[#v], v=concat(v, w))); vector(k, i, v[i])

first(n, k) = my(v, m=matrix(0, k)); for(x=1, n, v=row(x+1, k); m=concat(m, v)); m

CROSSREFS

n-th row: A293630 (n=2), A322423 (n=3), A322424 (n=4), A322425 (n=5).

Sequence in context: A262928 A228429 A108316 * A145574 A182579 A290737

Adjacent sequences:  A322423 A322424 A322425 * A322427 A322428 A322429

KEYWORD

nonn,tabl,look

AUTHOR

Iain Fox, Dec 07 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 September 17 19:16 EDT 2019. Contains 327137 sequences. (Running on oeis4.)