Column 3 of table A125790; also equals row sums of matrix power A078121^3.
A125793
Column 3 of table A125790; also equals row sums of matrix power A078121^3.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =84a(4) =656a(5) =8148a(6) =167568a(7) =5866452a(8) =356855440a(9) =38315189204
External references
- oeis: A125793