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)=2.
A120576
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)=2.
Terms
- a(0) =2a(1) =1a(2) =3a(3) =6a(4) =4a(5) =12a(6) =7a(7) =14a(8) =28a(9) =11a(10) =77a(11) =5a(12) =15a(13) =33a(14) =55a(15) =165a(16) =73a(17) =146a(18) =219a(19) =438a(20) =9a(21) =18a(22) =657a(23) =1314a(24) =8a(25) =16a(26) =23a(27) =24a(28) =36a(29) =46
External references
- oeis: A120576