a(n) = A000110(n) * A000111(n). The exponential limit of sec + tan. Row sums of A373428.
A320956
a(n) = A000110(n) * A000111(n). The exponential limit of sec + tan. Row sums of A373428.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =75a(5) =832a(6) =12383a(7) =238544a(8) =5733900a(9) =167822592a(10) =5859172975a(11) =240072637440
External references
- oeis: A320956