A008933 Number of strictly increasing addition chains of length n.

1, 1, 2, 6, 25, 135, 913, 7499, 73191, 833597, 10917343, 162402263, 2715430931, 50576761471, 1041203832858, 23529845888598

Offset

0,3

References

M. Torelli, Increasing integer sequences and Goldbach's conjecture, preprint, 1996.

Links

Table of n, a(n) for n=0..15.

M. Torelli, Increasing integer sequences and Goldbach's conjecture, RAIRO - Theoretical Informatics and Applications, vol.40, no.02 (April 2006), pp.107-121.

David Bruce Wilson, Home page

Crossrefs

Sequence in context: A247499 A124373 A010787 * A020010 A375505 A102812

Adjacent sequences: A008930 A008931 A008932 * A008934 A008935 A008936

Keyword

nonn

Author

Mauro Torelli (torelli(AT)hermes.mc.dsi.unimi.it)

Extensions

More terms from David Bruce Wilson

Status

approved