4084441

Appears in sequences

• Products of squares of 2 successive primes.at n=13A166329
• Each term of the sequence is the smallest positive integer that is coprime to all earlier terms and that has a different prime signature than all earlier terms. (a(1)=1.)at n=9A175231
• Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=7A208008