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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A197122 Number of partitions of n into positive quarter-squares (cf. A002620). 4
1, 1, 2, 2, 4, 4, 7, 7, 11, 12, 17, 18, 26, 28, 37, 40, 53, 57, 74, 79, 101, 109, 136, 145, 181, 195, 237, 255, 308, 332, 397, 427, 506, 546, 641, 688, 807, 868, 1007, 1081, 1250, 1342, 1544, 1655, 1893, 2033, 2313, 2477, 2812, 3015, 3403, 3644, 4102, 4390 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..100

EXAMPLE

a(10) = #{9+1, 6+4, 6+2+2, 6+2+1+1, 6+1+1+1+1, 4+4+2, 4+4+1+1, 4+2+2+2, 4+2+2+1+1, 4+2+1+1+1+1, 4+6x1, 2+2+2+2+2, 2+2+2+2+1+1, 2+2+2+1+1+1+1, 2+2+6x1, 2+8x1, 10x1} = 17.

PROG

(Haskell)

a197122 = p (drop 2 a002620_list) where

   p _          0             = 1

   p ks'@(k:ks) m | m < k     = 0

                  | otherwise = p ks' (m - k) + p ks m

CROSSREFS

Cf. A197081, A002378, A000290, A000041.

Sequence in context: A099383 A277133 A280954 * A064410 A266776 A062896

Adjacent sequences:  A197119 A197120 A197121 * A197123 A197124 A197125

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 10 2011

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 12:24 EDT 2018. Contains 316321 sequences. (Running on oeis4.)