Sequence starting with a(1) = 2 and always extended with the product "n-th digit * n-th term". When the product is = 0, we don't extend the sequence with 0 but with the smallest integer not yet present.
A337109
Sequence starting with a(1) = 2 and always extended with the product "n-th digit * n-th term". When the product is = 0, we don't extend the sequence with 0 but with the smallest integer not yet present.
Terms
- a(0) =2a(1) =4a(2) =16a(3) =16a(4) =96a(5) =96a(6) =576a(7) =5184a(8) =31104a(9) =279936a(10) =1679616a(11) =8398080a(12) =58786560a(13) =352719360a(14) =1763596800a(15) =1763596800a(16) =14108774400a(17) =56435097600a(18) =169305292800a(19) =169305292800a(20) =169305292800a(21) =1a(22) =4a(23) =8a(24) =56a(25) =504a(26) =4536a(27) =13608a(28) =81648a(29) =81648
External references
- oeis: A337109