a(n) = Bell(n+1) - 2^n + 1 + n, where Bell(i) is the i-th Bell number A000110(i).
A094762
a(n) = Bell(n+1) - 2^n + 1 + n, where Bell(i) is the i-th Bell number A000110(i).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =11a(4) =41a(5) =177a(6) =820a(7) =4020a(8) =20900a(9) =115473a(10) =677557a(11) =4211561a(12) =27640354a(13) =190891144a(14) =1382942176a(15) =10480109395a(16) =82864804285a(17) =682076675105
External references
- oeis: A094762