43303domain: NAppears in sequences1000000n+1, 1000000n+3, 1000000n+7, 1000000n+9 are all primes.at n=4A064965Numerator of the contraharmonic mean of the first n primes.at n=26A296199Number of nX6 0..1 arrays with every element equal to 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=10A298165