|
| |
|
|
A039671
|
|
Row sums up to the main diagonal of the "postage stamp" array (n,m >= 0) defined in A007059.
|
|
0
| |
|
|
1, 1, 3, 8, 21, 53, 130, 310, 724, 1661, 3757, 8398, 18588, 40800, 88918, 192592, 414907, 889631, 1899554, 4040864, 8567342, 18109698, 38176280, 80278798, 168432854, 352658013, 736977583, 1537420460, 3202035086, 6658948608
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
EXAMPLE
| a(0)=1, a(1)=0+1=1, a(2)=0+1+2=3, a(3)=0+1+3+4=8
|
|
|
MATHEMATICA
| f[ n_, m_ ] := f[ n, m ]=Which[ n>0, Sum[ f[ n-i, m ], {i, 1, m} ], n<0, 0, n==0, 1 ] Table[ Sum[ f[ n, j ], {j, 0, n} ], {n, 0, 30} ]
|
|
|
CROSSREFS
| Cf. A007059.
Sequence in context: A152086 A014396 A170881 * A166287 A186812 A027930
Adjacent sequences: A039668 A039669 A039670 * A039672 A039673 A039674
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Richard L. Ollerton and Eirwyn L. Ollerton (r.ollerton(AT)uws.edu.au)
|
| |
|
|
