OFFSET
1,1
COMMENTS
First differs from A213364 at a(12).
REFERENCES
M. Goeppert Mayer and J. Hans D. Jensen, Elementary Theory of Nuclear Shell Structure, J. Wiley and Sons, Inc. (1955).
LINKS
Library of Halexandria, Nuclear shell model, Table 1.
FORMULA
a(n) = 2*A212123(n).
EXAMPLE
Example 1: written as a triangle in which apparently row i is related to the (i-1)st level of nucleus. Triangle begins:
2;
6, 8;
14, 16, 20;
28, 32, 38, 40;
50, 58, 64, 68, 70;
82, 92, 100, 106, 110, 112;
126, 136, 142, 154, 162, 164, 168;
...
Example 2: written as an irregular triangle in which row j is related to the j-th shell of nucleus. In this case note that row 4 has only one term. Triangle begins:
2;
6, 8;
14, 16, 20;
28,
32, 38, 40, 50;
58, 64, 68, 70, 82;
92, 100, 106, 110, 112, 126;
136, 142, 154, 162, 164, 168, 184;
...
First seven terms of right border give the "magic numbers" A018226.
CROSSREFS
KEYWORD
nonn,tabf,hard,more
AUTHOR
Omar E. Pol, Jun 03 2012
STATUS
approved