A329778 Number of symmetric subsets of {1,..,2n} for which the reciprocal of the modular-part product is also a modular-part product.

4, 8, 16, 30, 56, 112, 232, 474, 928, 1744, 3976, 6540, 16136, 29680, 54208

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Richard Blecksmith, John Brillhart, and Irving Gerst, On the mod 2 reciprocation of infinite modular-part products and the parity of certain partition functions, Mathematics of Computation 54.189 (1990): 345-376. The sequence appears in Table 3.

Crossrefs

Cf. A329777.

Sequence in context: A301144 A298803 A320947 * A355391 A053163 A125626

Adjacent sequences: A329775 A329776 A329777 * A329779 A329780 A329781

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 29 2019

Status

approved