Number of length n 0..6 arrays with new values introduced in order from both ends.
A245161
Number of length n 0..6 arrays with new values introduced in order from both ends.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =23a(6) =65a(7) =199a(8) =654a(9) =2296a(10) =8569a(11) =33825a(12) =140581a(13) =612933a(14) =2795181a(15) =13298407a(16) =65851100a(17) =338654554a(18) =1805083341a(19) =9952373825a(20) =56645932971a(21) =332111798479
External references
- oeis: A245161