a(n) = n!*(2/1 - 3/2 + 4/3 - ... + s*(n+1)/n), where s = (-1)^(n+1).
A080958
a(n) = n!*(2/1 - 3/2 + 4/3 - ... + s*(n+1)/n), where s = (-1)^(n+1).
Terms
- a(0) =2a(1) =1a(2) =11a(3) =14a(4) =214a(5) =444a(6) =8868a(7) =25584a(8) =633456a(9) =2342880a(10) =69317280a(11) =312888960a(12) =10773578880a(13) =57424792320
External references
- oeis: A080958