A220843 Number of admissable 2-dimensional lattice patterns of type Sigma(2,3,5).

2, 4, 8, 16, 30, 60, 120, 240, 452, 904, 1708, 3416, 6832, 12860, 25720, 48720, 97440, 184704, 369408, 738816, 1390768, 2625128, 5250256, 9979776, 19959552

Offset

1,1

Comments

See Ban et al. (2012) for precise definition.

Links

Table of n, a(n) for n=1..25.

Jung-Chao Ban, Wen-Guei Hu, and Song-Sun Lin, Pattern generation problems arising in multiplicative integer systems, arXiv preprint arXiv:1207.7154 [math.DS], 2012-2013.

Crossrefs

Cf. A220842.

Sequence in context: A164263 A283836 A244825 * A277751 A277678 A018763

Adjacent sequences: A220840 A220841 A220842 * A220844 A220845 A220846

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 23 2012

Status

approved