Triangle read by rows: row n lists the divisors of n-th perfect number A000396(n) that are multiples of n-th Mersenne prime A000668(n).

A139247

Triangle read by rows: row n lists the divisors of n-th perfect number A000396(n) that are multiples of n-th Mersenne prime A000668(n).

Terms

    a(0) =3a(1) =6a(2) =7a(3) =14a(4) =28a(5) =31a(6) =62a(7) =124a(8) =248a(9) =496a(10) =127a(11) =254a(12) =508a(13) =1016a(14) =2032a(15) =4064a(16) =8128a(17) =8191a(18) =16382a(19) =32764a(20) =65528a(21) =131056a(22) =262112a(23) =524224a(24) =1048448a(25) =2096896a(26) =4193792a(27) =8387584a(28) =16775168a(29) =33550336

External references