Composite numbers m such that Sum_{i=1..k} (p_i/(p_i+1)) + Product_{i=1..k} (p_i/(p_i-1)) is an integer, where p_i are the k prime factors of m (with multiplicity).
A230110
Composite numbers m such that Sum_{i=1..k} (p_i/(p_i+1)) + Product_{i=1..k} (p_i/(p_i-1)) is an integer, where p_i are the k prime factors of m (with multiplicity).
Terms
- a(0) =8a(1) =10a(2) =30a(3) =63a(4) =64a(5) =512a(6) =588a(7) =720a(8) =800a(9) =1320a(10) =3960a(11) =4096a(12) =5184a(13) =5760a(14) =6400a(15) =7200a(16) =21600a(17) =27720a(18) =27900a(19) =32768a(20) =35280a(21) =41472a(22) =46080a(23) =51200a(24) =70840a(25) =84672a(26) =92400a(27) =95040a(28) =105600a(29) =151200
External references
- oeis: A230110