A010356 Triangle of single-edge stars with n edges by cyclotomic index.

1, 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 4, 9, 2, 1, 6, 20, 14, 1, 1, 7, 40, 50, 12, 1

Offset

3,6

Comments

The rows appear to be the same as in A339070 but reflected and with all 0's removed. - Andrew Howroyd, Nov 25 2020

Links

Table of n, a(n) for n=3..27.

George A. Baker Jr. and John M. Kincaid, The continuous-spin Ising model, g0:phi4:d field theory and the renormalization group. J. Statist. Phys. 24 (1981), no. 3, 469-528.

Example

Triangle begins:
   3 | 1;
   4 | 1;
   5 | 1, 1;
   6 | 1, 2, 1;
   7 | 1, 3, 3;
   8 | 1, 4, 9, 2;
   9 | 1, 6, 20, 14, 1;
  10 | 1, 7, 40, 50, 12, 1;
  ...

Crossrefs

Row sums give A010355.

Cf. A010358, A339070.

Sequence in context: A082870 A026009 A137171 * A100640 A242779 A215065

Adjacent sequences: A010353 A010354 A010355 * A010357 A010358 A010359

Keyword

nonn,tabf

Author

N. J. A. Sloane

Extensions

Offset corrected by Andrew Howroyd, Nov 25 2020

Status

approved