|
|
A093542
|
|
Antidiagonal sums of square array A093541, in which column (k+1) equals the self-convolution of row k.
|
|
3
|
|
|
1, 2, 4, 9, 24, 76, 284, 1244, 6342, 37527, 257802, 2058644, 19145230, 207751462, 2634249124, 39067322628, 677908600818, 13763069607754, 326806505773540, 9071727194243794, 294232148470098050, 11145427142600699697, 492893462783786269182, 25441819315371476142930
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
PROG
|
(PARI) T(n, k)=if(n==0 || k==0, 1, sum(i=0, n, T(k-1, i)*T(k-1, n-i)));
a(n)=sum(k=0, n, T(n-k, k))
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|