Numbers k that divide 10^k + 7^k.

Terms

a(0) =1a(1) =17a(2) =289a(3) =4063a(4) =4913a(5) =69071a(6) =83521a(7) =971057a(8) =1174207a(9) =1419857a(10) =1545589a(11) =16507969a(12) =19961519a(13) =24137569a(14) =26275013a(15) =232082623a(16) =271342117a(17) =280635473a(18) =339345823a(19) =369395771a(20) =410338673a(21) =415616459a(22) =446675221a(23) =3945404591