44807domain: NAppears in sequencesConvolution of A023532 and Lucas numbers.at n=20A023597Indices of primes in sequence defined by A(0) = 71, A(n) = 10*A(n-1) + 31 for n > 0.at n=16A101139Pentagonal numbers with prime indices.at n=39A116995Pentagonal numbers which are products of three distinct primes.at n=42A381650