Numbers k such that t(k) = t(k+1) where t(k) = tau(k) + sigma(k) = A007503(k) is the number of subgroups of the dihedral group of order 2k.

A322256

Numbers k such that t(k) = t(k+1) where t(k) = tau(k) + sigma(k) = A007503(k) is the number of subgroups of the dihedral group of order 2k.

Terms

    a(0) =14a(1) =1334a(2) =1634a(3) =2685a(4) =33998a(5) =42818a(6) =64665a(7) =84134a(8) =109214a(9) =122073a(10) =166934a(11) =289454a(12) =383594a(13) =440013a(14) =544334a(15) =605985a(16) =649154a(17) =655005a(18) =792855a(19) =845126a(20) =1642154a(21) =2284814a(22) =2305557a(23) =2913105a(24) =3571905a(25) =3682622a(26) =4701537a(27) =5181045a(28) =6431732a(29) =6444873

External references