A177236 a(n) = A049820(n) - A177235(n).

0, 0, 0, 0, 1, 0, 1, 1, 2, 1, 2, 1, 4, 3, 2, 2, 5, 3, 5, 4, 5, 4, 5, 4, 8, 7, 6, 5, 8, 5, 8, 8, 10, 9, 8, 6, 11, 10, 9, 8, 13, 10, 13, 12, 11, 10, 11, 10, 16, 14, 14, 13, 16, 13, 14, 13, 16, 15, 16, 13, 20, 19, 16, 16, 19, 16, 19, 18, 19, 16, 19, 17, 25, 24, 21, 20, 21, 18, 21, 20, 24, 23

Offset

1,9

Comments

Number of non-divisors k of n, 1<k<n, for which floor(n/k) is even. [From R. J. Mathar, May 24 2010]

Links

Table of n, a(n) for n=1..82.

Crossrefs

Cf. A000005, A049820, A177235

Sequence in context: A321757 A159272 A098372 * A341827 A138567 A103530

Adjacent sequences: A177233 A177234 A177235 * A177237 A177238 A177239

Keyword

nonn

Author

Omar E. Pol, May 23 2010

Extensions

Terms from a(16) onwards from R. J. Mathar, May 24 2010

Status

approved