81611

Properties

Appears in sequences

• Primes of the form 2*k^2 + 3.at n=35A201473
• Primes of the form 8n^2 + 3.at n=17A201611
• Prime intersections in a square spiral with positive integers: primes p such that there are four primes among eight nearest neighbors of p.at n=16A215470
• a(n) is the smallest prime number whose a056240-type is n (see Comments).at n=5A293652
• Indices of records in A243145.at n=19A299073
• Number of rectangular plane partitions of n.at n=31A323429
• Integers in Ulam's spiral for which the numbers around them form a square whose four corners are all prime numbers.at n=32A383596
• Primes having only {1, 6, 8} as digits.at n=29A385782
• Prime numbersat n=7981