151586

Appears in sequences

• Number of binary strings of length n with no substrings equal to 0011 0101 or 1010.at n=21A164504
• a(1) = 1, a(2) = 2, a(3) = 3; for n > 3, a(n) is the smallest positive number which has not appeared such that all the distinct prime factors of a(n-3) + a(n-2) + a(n-1) are factors of a(n).at n=35A361593