This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A212531 Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum 0

%I

%S 1,2,5,10,21,40,83,161,331,644,1102,3627,5646,10083,29188,53681,84121,

%T 237453,373114,1400757,2443494

%N Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum

%C Diagonal of A212536

%e Some solutions for n=8

%e ..1....2....2....2....1....1....1....1....2....1....1....1....4....6....1....2

%e ..1....2....2....2....1....1....4....1....2....1....1....2....7....6....2....2

%e ..2....2....2....2....4....2....4....1....4....1....1....2....7....6....3....2

%e ..2....2....3....2....5....4....5....3....4....2....1....2....7....6....3....3

%e ..4....2....5....2....5....4....5....3....4....3....2....3....7....6....3....3

%e ..4....2....5....4....8....4....5....3....8....4....2....4....8....6....3....4

%e ..7....4....5....7....8....4....8....6....8....4....2....4....8....6....3....4

%e ..7....4....6....7....8....4....8....6....8....8....2....6....8....6....6....4

%K nonn

%O 1,2

%A _R. H. Hardin_ May 20 2012

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.

Last modified September 21 19:39 EDT 2019. Contains 327279 sequences. (Running on oeis4.)