251983domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array defined in A026082.at n=13A026095Number of solutions to rev(x^2) = rev(x)^2 with at most n digits, where the function rev(x) reverses the digits of x.at n=14A225301Prime numbersat n=22203