13131313

Appears in sequences

• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3.at n=7A037582
• Quadruplets: base 10 representation is the juxtaposition of four identical strings.at n=12A074843
• Concatenation of segments of the digit sequence 1 3 1 3 1 3 1 3 1 3 1 3 1 3 1 3 1 3....at n=7A137318
• a(n) = 13*(100^(n+1) - 1)/99.at n=3A156641
• List of imprimitive words over the alphabet {1,3}.at n=27A213973