A329777 Number of subsets of {1,..,2n} for which the reciprocal of the modular-part product is also a modular-part product.

4, 14, 56, 218, 968, 3052, 13456, 57074, 225904, 868924, 4190216, 12442132, 67092488, 192697400, 793659328

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. A329778.

Sequence in context: A149490 A304977 A143406 * A323787 A132837 A259808

Adjacent sequences: A329774 A329775 A329776 * A329778 A329779 A329780

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 29 2019

Status

approved