a(n) = A062401(A065391(n)): phi(sigma(m)) peak values for numbers m (listed in A065391) at which those peaks are first reached.
A065392
a(n) = A062401(A065391(n)): phi(sigma(m)) peak values for numbers m (listed in A065391) at which those peaks are first reached.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =8a(4) =12a(5) =30a(6) =36a(7) =72a(8) =126a(9) =180a(10) =360a(11) =432a(12) =660a(13) =930a(14) =1512a(15) =2160a(16) =3300a(17) =3780a(18) =5184a(19) =6552a(20) =11160a(21) =13860a(22) =19800a(23) =23232a(24) =32760a(25) =45360a(26) =47520a(27) =50400a(28) =58080a(29) =61776
External references
- oeis: A065392