3131313

Appears in sequences

• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,1.at n=6A037589
• 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=6A137318
• Numbers n such that A244112(n) | n.at n=14A278440