Number of Khalimsky-continuous functions with a three-point codomain.

Terms

a(0) =3a(1) =5a(2) =11a(3) =19a(4) =41a(5) =71a(6) =153a(7) =265a(8) =571a(9) =989a(10) =2131a(11) =3691a(12) =7953a(13) =13775a(14) =29681a(15) =51409a(16) =110771a(17) =191861a(18) =413403a(19) =716035a(20) =1542841a(21) =2672279a(22) =5757961a(23) =9973081a(24) =21489003a(25) =37220045a(26) =80198051a(27) =138907099a(28) =299303201a(29) =518408351