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A070217 Numbers not represented by a known atomic weight. 2
2, 3, 5, 8, 13, 17, 18, 21, 33, 34, 38, 42, 43, 45, 46, 47, 48, 49, 50 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

Francis W. Aston, Mass spectra and isotopes, Nobel Lecture, December 12, 1922.

CROSSREFS

Cf. A007656.

Sequence in context: A308495 A221672 A241551 * A256121 A308869 A001149

Adjacent sequences:  A070214 A070215 A070216 * A070218 A070219 A070220

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, May 07 2002

STATUS

approved

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Last modified August 10 22:22 EDT 2020. Contains 336403 sequences. (Running on oeis4.)