62282domain: NAppears in sequencesn*10^4-1, n*10^4-3, n*10^4-7 and n*10^4-9 are all prime.at n=15A064978a(n) = 1^n + 5^n + 6^n.at n=6A074516Number of days after Jan 01 1000 such that the date written in the ISO-8601-format YYYYMMDD is palindromic.at n=21A210883