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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A216642 Number of nondecreasing arrays of n 1..n integers with the sum of their 4th powers equal to sum(i^4,i=1..n) 0
1, 1, 1, 1, 1, 1, 2, 2, 5, 11, 25, 51, 136, 367, 886, 2507, 6986, 20453, 60708, 172073, 524771, 1628140, 5085497 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

Column 4 of A216645

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

All solutions for n=9

..3....1....1....1....1

..3....3....2....1....1

..4....3....3....2....1

..5....5....4....2....2

..6....6....5....4....5

..7....6....6....5....7

..7....6....7....6....8

..8....8....8....9....8

..8....9....9....9....8

CROSSREFS

Sequence in context: A078405 A109278 A112527 * A227999 A049680 A153983

Adjacent sequences:  A216639 A216640 A216641 * A216643 A216644 A216645

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 11 2012

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 May 26 02:35 EDT 2019. Contains 323579 sequences. (Running on oeis4.)