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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A048283 For k >= a(n), there are A048284(n) numbers expressible as a sum of exactly k-n k-gonal numbers. 1
6, 9, 10, 13, 16, 19, 20, 22, 25, 28, 29, 31, 34, 37, 40, 41, 43, 46, 49, 52, 53, 54, 57, 58, 61, 64, 67, 68, 70, 73, 74, 75, 78, 81, 84, 86, 89, 90, 92, 93, 94, 96, 99, 102, 105, 108, 109, 110, 112, 113, 115, 118, 121, 124, 126, 129, 130, 132, 133, 136, 137, 138, 140, 143, 146, 149, 152 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..66.

EXAMPLE

For k >= 6, the 2 numbers 2k-1 and 5k-4 are the sum of at best k k-gonal numbers. Hence a(0) = 6.

For k >= 9, the 4 numbers k-1, 2k-2, 4k-4 and 5k-5 are the sum of at best k-1 k-gonal numbers. Hence a(1) = 9.

For k >= 10, the 6 numbers k-2, 2k-3, 3k-4, 4k-5, 5k-6 and 8k-9 are the sum of at best k-2 k-gonal numbers. Hence a(2) = 10.

CROSSREFS

Sequence in context: A125494 A177029 A105066 * A169692 A145311 A037198

Adjacent sequences:  A048280 A048281 A048282 * A048284 A048285 A048286

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

Definition corrected by Jonathan Sondow, Jun 27 2007

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 June 25 12:55 EDT 2019. Contains 324352 sequences. (Running on oeis4.)