Irregular array where the n-th row are the divisors, not occurring earlier in the sequence, of the sum of the terms in all previous rows. a(1)=4.
A120578
Irregular array where the n-th row are the divisors, not occurring earlier in the sequence, of the sum of the terms in all previous rows. a(1)=4.
Terms
- a(0) =4a(1) =1a(2) =2a(3) =7a(4) =14a(5) =28a(6) =8a(7) =56a(8) =3a(9) =5a(10) =6a(11) =10a(12) =12a(13) =15a(14) =20a(15) =24a(16) =30a(17) =40a(18) =60a(19) =120a(20) =31a(21) =93a(22) =155a(23) =465a(24) =13a(25) =39a(26) =403a(27) =1209a(28) =17a(29) =169
External references
- oeis: A120578