A275875 Subadditive triangle read by rows associated with the Grundy function A025480.

2, 1, 3, 1, 2, 3, 1, 1, 2, 4, 1, 1, 2, 2, 4, 1, 1, 1, 2, 3, 4, 1, 1, 1, 2, 2, 3, 4, 1, 1, 1, 1, 2, 2, 3, 5, 1, 1, 1, 1, 2, 2, 2, 3, 5, 1, 1, 1, 1, 1, 2, 2, 3, 3, 5

Offset: 0

Author

N. J. A. Sloane, Aug 14 2016

Keywords

• nonn
• tabl
• more

Comments

See Levine 2004/2006 for definition. His Theorem 3.6 shows that there is a one-to-one correspondence between fractal sequences and subadditive triangles.

Examples

			Triangle begins:
2,
1,3,
1,2,3,
1,1,2,4,
1,1,2,2,4,
1,1,1,2,3,4,
1,1,1,2,2,3,4,
1,1,1,1,2,2,3,5,
1,1,1,1,2,2,2,3,5,
1,1,1,1,1,2,2,3,3,5,
...
		

References

• L. Levine, Fractal sequences and restricted Nim, Ars Combin. 80 (2006), 113-127.

Links

• L. Levine, Fractal sequences and restricted Nim, arXiv:math/0409408 [math.CO], 2004.

Crossrefs

Cf. A025480.