60601

Properties

Appears in sequences

• Idempotent semigroups of order n, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).at n=8A002788
• Triangle read by rows: semigroups of order n with k idempotents, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).at n=35A058123
• Number of terms of the fractional part of A001203 for which the geometric mean produces increasingly better approximations to Khinchin's constant.at n=19A059101
• Primes which can be expressed as concatenation of powers of 6 and 0's.at n=31A066597
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,6,6).at n=12A078964
• Prime numbers p such that p+6, p^2+6^2, p^4+6^4 are all primes.at n=19A107441
• Integers n such that n is prime and x is prime, where (x,y) is the smallest solution to the Pell equation with D = n.at n=37A109748
• Least prime P1 of 8 different primes: 4 consecutive primes P1 P2 P3 P4 and 4 primes Q1 Q2 Q3 Q4 such that Q1 with same digits than P1 if not 6 or 9, if 6 then replace with 9 and if 9 then replace with 6, same for Q2 from P2 Q3 from P3 and Q4 from P4.at n=5A122713
• Primes which become emirps when rotated by 180 degrees on a digital clock display.at n=17A145750
• Primes prime(k) such that the sum of the squares of digits of prime(k) equals the sum of the squares of digits of k.at n=28A193255
• Number of free poly-IH19-tiles (holes allowed) with n cells.at n=9A197552
• Primes having only {0, 1, 6} as digits.at n=20A199326
• Primes formed by concatenating k, k, and 1 for k >= 1.at n=16A210511
• Primes of the form b*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.at n=12A309739
• Prime numbers that have the same base-10 digits as their prime index (with multiplicity), disregarding zero digits.at n=5A355317
• Numbers k >= 0 such that the interval [A000217(k), A000217(k + 1)] contains at least one Fibonacci number (A000045).at n=45A388653
• Prime numbersat n=6106