a(n) is the number of Khalimsky-continuous functions with four-point codomain and an n-point range.
A131935
a(n) is the number of Khalimsky-continuous functions with four-point codomain and an n-point range.
Terms
- a(0) =4a(1) =7a(2) =15a(3) =31a(4) =65a(5) =136a(6) =285a(7) =597a(8) =1251a(9) =2621a(10) =5492a(11) =11507a(12) =24111a(13) =50519a(14) =105853
External references
- oeis: A131935