Triangle T(n,k) (1 <= k <= n) where the first column (T(n,1)) is the sequence of secant numbers A000364.
A064670
Triangle T(n,k) (1 <= k <= n) where the first column (T(n,1)) is the sequence of secant numbers A000364.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =5a(4) =20a(5) =36a(6) =61a(7) =244a(8) =504a(9) =576a(10) =1385a(11) =5540a(12) =11916a(13) =17280a(14) =14400a(15) =50521a(16) =202084a(17) =442224a(18) =697536a(19) =792000a(20) =518400a(21) =2702765a(22) =10811060a(23) =23870196a(24) =39202560a(25) =50198400a(26) =47174400a(27) =25401600a(28) =199360981a(29) =797443924
External references
- oeis: A064670