a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2*a(i) nor Sum_{j=1..n-1} ( b_j*a(j) ) where 0 < i < n, b_j = 1 or 0.
A331809
a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2*a(i) nor Sum_{j=1..n-1} ( b_j*a(j) ) where 0 < i < n, b_j = 1 or 0.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =9a(4) =13a(5) =31a(6) =35a(7) =92a(8) =118a(9) =280a(10) =350a(11) =866a(12) =1102a(13) =2668a(14) =3368a(15) =8240a(16) =10444a(17) =25420a(18) =32156a(19) =78464a(20) =99352a(21) =242128a(22) =306440a(23) =747272a(24) =945976a(25) =2306128a(26) =2919008a(27) =7117088a(28) =9009040a(29) =21964144
External references
- oeis: A331809