Odd numbers for which sigma(k) is congruent to 2 modulo 4 and the 3-adic valuation of k is one larger than the 3-adic valuation of sigma(k).

A351534

Odd numbers for which sigma(k) is congruent to 2 modulo 4 and the 3-adic valuation of k is one larger than the 3-adic valuation of sigma(k).

Terms

    a(0) =45a(1) =261a(2) =369a(3) =909a(4) =1017a(5) =1233a(6) =1341a(7) =1557a(8) =2313a(9) =2529a(10) =2637a(11) =2853a(12) =3177a(13) =3501a(14) =3609a(15) =4149a(16) =4293a(17) =4581a(18) =5121a(19) =5445a(20) =5553a(21) =5733a(22) =5769a(23) =5877a(24) =6093a(25) =6525a(26) =6849a(27) =7173a(28) =7389a(29) =7713

External references