Numbers k such that k + sigma(k) + sigma(sigma(k)) is a repdigit.
A116028
Numbers k such that k + sigma(k) + sigma(sigma(k)) is a repdigit.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =25a(4) =119a(5) =157a(6) =2413a(7) =2623a(8) =8415a(9) =14962a(10) =18303a(11) =66078a(12) =1031747a(13) =62826675a(14) =692799137a(15) =759500195a(16) =1144100379
External references
- oeis: A116028