427530937domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(1)=1; a(n) = the reversal of (a(n-1) + spd(a(n-1))), where spd(n) is the sum of d^d for d the digits of n (with 0^0 = 1).at n=11A121167Prime numbersat n=22723796