22343

Properties

Appears in sequences

• Prime number spiral (clockwise, Southeast spoke).at n=25A054564
• Numbers k such that k, sigma(k) and phi(k) have the same decimal digits (ignoring multiplicity).at n=36A082059
• Primes of the form 8*k-1 such that 4*k-1 and 16*k-1 are also primes.at n=21A101792
• Primes p such that q = p+d (with d >= 6) is the next prime and both p and q are Sophie Germain primes.at n=38A128825
• Primes congruent to 41 mod 59.at n=39A142768
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 12 : primes in A146336.at n=19A146357
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.at n=7A151177
• Primes of the form 6*n^2+17.at n=41A151953
• Primes p0 such that p0+p1+p2-+2 are primes; p0,p1,p2 are three consecutive primes.at n=23A158351
• Numbers n with property that n^2 starts and ends with 49.at n=13A159815
• Primes q (except greater of twin primes) with result 2 under iterations of {r mod (max prime p < r)} starting at r = q.at n=27A175080
• Number of nondecreasing arrangements of 4 nonzero numbers in -(n+2)..(n+2) with sum zero.at n=43A188334
• Primes having only {2, 3, 4} as digits.at n=16A199342
• Numbers m such that m, m-1, m-2 and m-3 are 1,2,3,4-almost primes respectively.at n=31A201220
• T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=48A241306
• Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=6A241309
• Numbers n for which the digital sum contains the same distinct digits as the digital product but the digital sum is not equal to the digital product.at n=32A249335
• Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime.at n=15A295000
• Inert rational primes in the intersection of all Q(sqrt(-d)) where d is a Heegner number.at n=4A309024
• Numbers at the start of a run of 2 or more consecutive primes that are Sophie Germain primes.at n=38A339474