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A125794
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Column 4 of table A125790; also equals row sums of matrix power A078121^4.
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10
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1, 5, 25, 165, 1625, 25509, 664665, 29559717, 2290267225, 314039061413, 77160820913241, 34317392762489765, 27859502236825957465, 41575811106337540656037, 114746581654195790543205465, 588765612737696531880325270437, 5642056933026209681424588087899225
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OFFSET
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0,2
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COMMENTS
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Triangle A078121 shifts left one column under matrix square and is related to partitions into powers of 2.
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LINKS
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PROG
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(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]))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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