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A008933 Number of strictly increasing addition chains of length n. 4
1, 1, 2, 6, 25, 135, 913, 7499, 73191, 833597, 10917343, 162402263, 2715430931, 50576761471, 1041203832858, 23529845888598 (list; graph; refs; listen; history; text; internal format)
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 A102812 A020100

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

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Last modified October 14 23:54 EDT 2019. Contains 328025 sequences. (Running on oeis4.)