A015942 Positive integers n such that n | (2^n + n/2 - 1).

6, 18, 42, 54, 126, 162, 294, 342, 378, 486, 882, 1026, 1134, 1314, 1458, 1806, 2058, 2394, 2646, 3078, 3402, 3942, 4374, 5334, 5418, 6174, 6498, 7182, 7938, 9198, 9234, 10206, 11826, 12642, 13122, 14154, 14406, 16002, 16254, 16758

Offset: 1

Author

Robert G. Wilson v

Keywords

• nonn
• easy

Crossrefs

Cf. A015945.

Programs

Python

A015942_list = [n for n in range(2,10**6,2) if pow(2,n,n) == n//2+1] # Chai Wah Wu, Mar 25 2021

Formula

a(n) = 2 * A014945(n). [Max Alekseyev, Aug 04 2011]