Products of the Jacobsthal numbers and the integers: a(n) = n * A001045(n+1).

Terms

a(0) =0a(1) =1a(2) =6a(3) =15a(4) =44a(5) =105a(6) =258a(7) =595a(8) =1368a(9) =3069a(10) =6830a(11) =15015a(12) =32772a(13) =70993a(14) =152922a(15) =327675a(16) =699056a(17) =1485477a(18) =3145734a(19) =6640975a(20) =13981020a(21) =29360121a(22) =61516466a(23) =128625315a(24) =268435464a(25) =559240525a(26) =1163220318a(27) =2415919095a(28) =5010795188a(29) =10379504289