A214821 -id:A214821 - cp's OEIS frontend

Showing 1-4 of 4 results.

A214823 Number of genus 2 unsensed hypermaps with n darts.

Original entry on oeis.org

0, 0, 0, 0, 4, 39, 456, 5554, 63378, 698568, 7391499, 75807708

Offset: 1

N. J. A. Sloane, Aug 01 2012

Timothy R. Walsh, Space-efficient generation of nonisomorphic maps and hypermaps
T. R. Walsh, Space-Efficient Generation of Nonisomorphic Maps and Hypermaps, J. Int. Seq. 18 (2015) # 15.4.3

Cf. A090371, A118094, A214819, A214820, A057005; A214821-A214823, A215017, A215018.

A215017 Number of genus 3 unsensed hypermaps with n darts.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 25, 678, 15867, 307880, 5180472, 78573507

Offset: 1

N. J. A. Sloane, Aug 01 2012

Timothy R. Walsh, Space-efficient generation of nonisomorphic maps and hypermaps
T. R. Walsh, Space-Efficient Generation of Nonisomorphic Maps and Hypermaps, J. Int. Seq. 18 (2015) # 15.4.3

Cf. A090371, A118094, A214819, A214820, A057005; A214821-A214823, A215017, A215018.

A215018 Number of unsensed hypermaps with n darts and any genus.

Original entry on oeis.org

1, 3, 7, 26, 91, 490, 2785, 20434, 171579, 1671193, 18192737, 218487504

Offset: 1

N. J. A. Sloane, Aug 01 2012

Timothy R. Walsh, Space-efficient generation of nonisomorphic maps and hypermaps
T. R. Walsh, Space-Efficient Generation of Nonisomorphic Maps and Hypermaps, J. Int. Seq. 18 (2015) # 15.4.3

Cf. A090371, A118094, A214819, A214820, A057005; A214821-A214823, A215017, A215018.

A214822 Number of genus 1 unsensed hypermaps with n darts.

Original entry on oeis.org

0, 0, 1, 6, 30, 211, 1350, 9636, 69169, 513012, 3843024, 29107494

Offset: 1

N. J. A. Sloane, Aug 01 2012

Timothy R. Walsh, Space-efficient generation of nonisomorphic maps and hypermaps
T. R. Walsh, Space-Efficient Generation of Nonisomorphic Maps and Hypermaps, J. Int. Seq. 18 (2015) # 15.4.3

Cf. A090371, A118094, A214819, A214820, A057005; A214821-A214823, A215017, A215018.

Showing 1-4 of 4 results.