A161150 a(n) = (largest odd divisor of n)*(largest power of 2 dividing (n+1)).

2, 1, 12, 1, 10, 3, 56, 1, 18, 5, 44, 3, 26, 7, 240, 1, 34, 9, 76, 5, 42, 11, 184, 3, 50, 13, 108, 7, 58, 15, 992, 1, 66, 17, 140, 9, 74, 19, 312, 5, 82, 21, 172, 11, 90, 23, 752, 3, 98, 25, 204, 13, 106, 27, 440, 7, 114, 29, 236, 15, 122, 31, 4032, 1, 130, 33, 268, 17, 138

Offset: 1

Author

Leroy Quet, Jun 03 2009

Keywords

• nonn

Crossrefs

Cf. A161151, A000265, A006519, A002378.

Formula

a(n)*A161151(n) = n*(n+1) = A002378(n).

a(n) = A000265(n)*A006519(n+1).

Extensions

Extended by Ray Chandler, Jun 11 2009