References to A121818

Average of atomic weights of all isotopes of first n elements, rounded to nearest integer.
1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27

1 seqfan posts