A244343 Least even k such that sfdf(k-3) > sfdf(k-1) >= A050376(n), where sfdf(n) is the smallest Fermi-Dirac factor of n (A223490).

16, 46, 46, 64, 100, 254, 326, 392, 392, 590, 776, 776, 1190, 1520, 1814, 2420, 2624, 3764, 3764, 3764, 4454, 4454, 4892, 5752, 6400, 6400, 7210, 9380, 9524, 11414, 11414, 13190, 13190, 13190, 18272, 18272, 19940, 20414, 20414, 21824, 24614, 24614, 25592

Offset

2,1

Comments

a(n) is a Fermi-Dirac analog of A242719.

Links

Table of n, a(n) for n=2..44.

Example

If k is even such that k-1 is either 1 or in A050376, then k cannot be required. Thus, if n=2, then k=2,4,6,8,10,12,14 are not required, while for k=16 we have sfdf(16-3) = 13 > sfdf(16-1) = 3 = A050376(2). So a(2)=16.

Crossrefs

Cf. A050376, A223490, A242719.

Sequence in context: A345754 A318093 A223029 * A235772 A235555 A069128

Adjacent sequences: A244340 A244341 A244342 * A244344 A244345 A244346

Keyword

nonn

Author

Vladimir Shevelev and Peter J. C. Moses, Jun 26 2014

Status

approved