A036390 First differences of composite connected numbers (A029827).

30, 6, 4, 2, 6, 22, 10, 4, 12, 4, 2, 2, 4, 30, 18, 14, 2, 14, 4, 2, 2, 4, 2, 4, 2, 4, 6, 4, 2, 8, 2, 2, 4, 2, 68, 10, 2, 20, 10, 4, 18, 4, 2, 2, 10, 2, 4, 4, 2, 6, 2, 4, 8, 4, 4, 2, 4, 2, 2, 4, 10, 2, 2, 2, 2, 4, 2, 2, 4, 4, 2, 2, 4, 4, 2, 4, 92, 26, 10, 16, 2, 28, 10, 2, 6, 8, 20, 6, 8, 2, 8, 10, 6

Offset

1,1

Comments

Observe the high local gaps, which arise between two connected numbers of binary order (A029837) g and g+1. E.g., five consecutive connected numbers in A029827 are 4087, 4089, 4095, 4369, and 4471, and corresponding differences are 2, 6, 274, and 102. Thus the density of connected numbers rises and falls in interval [ 2^(g-1), 2^g ].

Links

Table of n, a(n) for n=1..93.

Crossrefs

Cf. A029827, A029837.

Sequence in context: A040878 A328962 A073460 * A040879 A040877 A265995

Adjacent sequences: A036387 A036388 A036389 * A036391 A036392 A036393

Keyword

nonn

Author

Labos Elemer

Status

approved