19229

Appears in sequences

• Each term is previous term plus ceiling of root mean square of two previous terms.at n=17A114833
• Numbers k such that 2*k+1, 3*k+2, 4*k+3 and 5*k+4 are primes.at n=19A138700
• Number of Golomb rulers of length n.at n=34A169942
• Numbers n such that phi(n)=2*phi(n-1).at n=20A171271
• a(n) = prime(n)^3 mod (n^2 + prime(n)^2).at n=36A243769
• Numbers n such that n!3 + 3 is prime, where n!3 = n!!! is a triple factorial number (A007661).at n=40A249400
• Number of nX3 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=10A300460
• Consecutive states of the linear congruential pseudo-random number generator 170*s mod 30323 when started at s=1.at n=30A385033