Primitive terms of A388022: numbers k that satisfy sigma(k) AND 3*k = 3*k, but none of whose proper divisors satisfy the same condition.
A388025
Primitive terms of A388022: numbers k that satisfy sigma(k) AND 3*k = 3*k, but none of whose proper divisors satisfy the same condition.
Terms
- a(0) =120a(1) =672a(2) =2352a(3) =5220a(4) =5616a(5) =7344a(6) =10296a(7) =10944a(8) =14256a(9) =16416a(10) =17100a(11) =26496a(12) =26820a(13) =32472a(14) =48312a(15) =62820a(16) =68112a(17) =70020a(18) =91620a(19) =91872a(20) =93024a(21) =97152a(22) =98736a(23) =98820a(24) =103968a(25) =110340a(26) =111456a(27) =145600a(28) =164016a(29) =183168
External references
- oeis: A388025