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A125794
Column 4 of table A125790; also equals row sums of matrix power A078121^4.
10
1, 5, 25, 165, 1625, 25509, 664665, 29559717, 2290267225, 314039061413, 77160820913241, 34317392762489765, 27859502236825957465, 41575811106337540656037, 114746581654195790543205465, 588765612737696531880325270437, 5642056933026209681424588087899225
OFFSET
0,2
COMMENTS
Triangle A078121 shifts left one column under matrix square and is related to partitions into powers of 2.
LINKS
PROG
(PARI) a(n)=local(p=4, q=2, A=Mat(1), B); for(m=1, n+1, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i || j==1, B[i, j]=1, B[i, j]=(A^q)[i-1, j-1]); )); A=B); return(sum(c=0, n, (A^p)[n+1, c+1]))
CROSSREFS
A diagonal of A152977.
Sequence in context: A361916 A356596 A134007 * A109793 A112242 A035341
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 10 2006
STATUS
approved