70101

Appears in sequences

• Second-order Fibonacci numbers.at n=21A010049
• a(n) = T(2n+1,n+3), T given by A026758.at n=7A026878
• a(n) = self-convolution of row n of array T given by A027926.at n=10A027989
• a(1) = 1; a(n+1) is the smallest number > a(n) which differs from it at every digit.at n=42A068860
• The sequence alternates even and odd integers but also even and odd digits; it is monotonically increasing and a(n) is always the smallest integer fitting the pattern.at n=23A137667
• Number of ternary length-2 squarefree words of length n not containing the subwords 021 or 10.at n=26A373554