Number of morphisms in full subcategories of Set spanned by {{}, {1}, {1, 2}, ..., {1, 2, ..., n}}.
A231344
Number of morphisms in full subcategories of Set spanned by {{}, {1}, {1, 2}, ..., {1, 2, ..., n}}.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =11a(4) =60a(5) =499a(6) =5705a(7) =82207a(8) =1419768a(9) =28501125a(10) =651233671a(11) =16676686707a(12) =472883844004
External references
- oeis: A231344