login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A320347 Number of partition into distinct parts (a_1, a_2, ... , a_m) (a_1 > a_2 > ... > a_m and Sum_{k=1..m} a_k = n) such that a1 - a2, a2 - a_3, ... , a_{m-1} - a_m are different. 2
1, 1, 2, 2, 3, 3, 5, 6, 6, 9, 11, 10, 15, 18, 19, 24, 31, 29, 40, 44, 51, 56, 72, 69, 90, 97, 114, 125, 154, 151, 192, 207, 237, 255, 304, 314, 377, 401, 457, 493, 573, 596, 698, 750, 845, 905, 1034, 1104, 1255, 1354, 1507, 1624, 1817, 1955, 2178, 2357, 2605, 2794, 3077, 3380 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..100

EXAMPLE

n = 9

[9]        ooooooooo

------------------------------------

[8, 1]      *******o  a_1 - a_2 = 7.

            oooooooo

------------------------------------

[7, 2]       *****oo  a_1 - a_2 = 5.

             ooooooo

------------------------------------

[6, 3]        ***ooo  a_1 - a_2 = 3.

              oooooo

------------------------------------

[6, 2, 1]         *o  a_2 - a_3 = 1.

              ****oo  a_1 - a_2 = 4.

              oooooo

------------------------------------

[5, 4]         *oooo  a_1 - a_2 = 1.

               ooooo

------------------------------------

a(9) = 6.

CROSSREFS

Cf. A000009, A320348.

Sequence in context: A316313 A325876 A325468 * A178932 A325852 A206439

Adjacent sequences:  A320344 A320345 A320346 * A320348 A320349 A320350

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Oct 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 January 19 00:40 EST 2020. Contains 331030 sequences. (Running on oeis4.)