OFFSET
1,6
COMMENTS
Computed over a period of several years and confirmed using the Molgen program.
LINKS
David Consiglio, Jr., Table of n, a(n) for n = 1..130
Molgen, Molecular Structure Generation
EXAMPLE
Triangle begins:
1
1 1 1
1 2 3 2 1
2 5 9 11 7 3
etc.
a(3,1) = 2 because there are two structures that contain 3 carbons and have 1 unit of unsaturation (propene and cyclopropane).
CROSSREFS
KEYWORD
nice,nonn,tabf
AUTHOR
David Consiglio, Jr., Jan 28 2008, Apr 23 2008
STATUS
approved