22270

Appears in sequences

• Starting positions of strings of 3 1's in the decimal expansion of Pi.at n=20A050209
• Third column (m=4) of array A090452.at n=19A090453
• Numbers n such that if p=prime(n), then p, p+6, p+12, p+18 are consecutive primes with p=6*k+5 for some k, where prime(n) denotes n-th prime.at n=37A090835
• Minimum diameter of an integral set of n points in the plane, no 3 on a line, no 4 on a circle.at n=6A096873
• Where A007535 reaches a record.at n=39A098653
• Numbers k such that k+1, k+3, k+7 and k+9 are all primes.at n=20A125855
• 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, 0), (-1, 0, 1), (1, 0, -1), (1, 1, 1)}.at n=9A149263
• a(n) = a(n-1) + floor(a(n-2)/3) with a(0)=2, a(1)=3.at n=41A182229
• Numbers m such that m+1, m+3, m+7, m+9 and m+13 are all primes.at n=7A245304
• a(n) = k is a number such that A007535(k), the smallest pseudoprime to base k ( > k), is the n-th Carmichael number.at n=9A293563