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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A122172 Triangle read by rows relating A074139, A074141, A078436 and A079025. 4

%I

%S 1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,2,1,1,3,3,1,1,1,1,1,1,1,2,2,2,1,1,2,3,

%T 2,1,1,3,4,3,1,1,4,6,4,1

%N Triangle read by rows relating A074139, A074141, A078436 and A079025.

%C A proper definition is needed for this sequence.

%C Are the row sums A074139(n) and the row lengths A000041(n)? - _R. J. Mathar_, May 08 2019

%e The triangle begins

%e 1

%e 1 1

%e 1 1 1

%e 1 2 1

%e 1 1 1 1

%e 1 2 2 1

%e 1 3 3 1

%e 1 1 1 1 1

%e 1 2 2 2 1

%e 1 2 3 2 1

%e 1 3 4 3 1

%e 1 4 6 4 1

%e 1 1 1 1 1 1

%e 1 2 2 2 2 1

%e 1 2 3 3 2 1

%e 1 3 4 4 3 1

%e 1 3 5 5 3 1

%e 1 4 7 7 4 1

%e 1 5 10 10 5 1

%K obsc,nonn,tabf,more

%O 0,8

%A _Alford Arnold_, Aug 23 2006

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 22 13:47 EDT 2020. Contains 337289 sequences. (Running on oeis4.)