Pairs of primitive deficient numbers having the same value of sigma(k)/k, listed by increasing value of the larger of the two k values.

A212610

Pairs of primitive deficient numbers having the same value of sigma(k)/k, listed by increasing value of the larger of the two k values.

Terms

    a(0) =135a(1) =819a(2) =3375a(3) =6975a(4) =25137a(5) =40131a(6) =68607a(7) =154791a(8) =22113a(9) =448335a(10) =557375a(11) =721525a(12) =451737a(13) =1401543a(14) =1278316a(15) =1680705a(16) =273a(17) =2876211a(18) =6739509a(19) =10590125a(20) =188325a(21) =11208375a(22) =8775a(23) =12525435a(24) =9020375a(25) =13934375a(26) =20365625a(27) =56162575a(28) =1083537a(29) =83479977

External references