1,2

Table of n, a(n) for n=1..71.

Y. Bentor, Periodic Table: Neutrons, Chemical Elements.com.

M. Winter, The periodic table of the elements, WebElements.

a(79)=118 because the 79th element is gold, whose only naturally occurring isotope is Au-197, which has 79 protons, 79 electrons and 118 neutrons.

Cf. A007656, A058318.

Sequence in context: A059583 A086370 A083788 * A278761 A287076 A344587

Adjacent sequences: A058314 A058315 A058316 * A058318 A058319 A058320

nonn,fini

Labos Elemer, Dec 12 2000

a(38) updated by Sean A. Irvine, Aug 24 2021

approved