A187486 Distance between first and second positions of A181762(n).

0, 15, 0, 25, 0, 35, 0, 45, 0, 55, 0, 65, 0, 75, 0, 85, 15, 95, 0, 105, 0, 115, 0, 125, 0, 135, 0, 145, 25, 155, 0, 165, 0, 175, 0, 185, 0, 195, 0, 205, 35, 215, 0, 225, 0, 235, 0, 245, 0, 255, 0, 265, 45, 275, 0, 285, 0, 295, 0, 305, 0, 315, 0, 325, 55, 335, 0, 345, 0, 355

Offset: 0

Author

Zak Seidov, Mar 10 2011

Keywords

• nonn

Comments

Some entries of A181762 occur twice some only once.

The sequence gives the distance between first and second positions of A181762(n),

a(n)=0 if A181762(n) occurs only once.

The numbers that occur in A181762 only once are 0, 2, 4, 6, 8, 10, 12, 14, 18, 20, 22, 24, 26, 30, 32, 34, 36, 38, 42, 44, 46, ...

Crossrefs

Cf. A181762.