Numbers k that divide the alternating sum sigma(1) - sigma(2) + sigma(3) - sigma(4) + ... + ((-1)^(k+1))*sigma(k).
A067931
Numbers k that divide the alternating sum sigma(1) - sigma(2) + sigma(3) - sigma(4) + ... + ((-1)^(k+1))*sigma(k).
Terms
- a(0) =1a(1) =2a(2) =11a(3) =19a(4) =36a(5) =45a(6) =152a(7) =377a(8) =418a(9) =3794a(10) =4423a(11) =14495a(12) =31148a(13) =42224a(14) =49279a(15) =120447a(16) =1018376a(17) =2605261a(18) =17484247a(19) =368070997a(20) =850833878a(21) =1121254607a(22) =3440701629a(23) =7863041200
External references
- oeis: A067931