A138101 The atomic numbers read along the even-indexed rows of the Janet table of the elements.

3, 4, 13, 14, 15, 16, 17, 18, 19, 20, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120

Offset: 1

Author

Paul Curtz, May 03 2008

Keywords

• nonn
• less
• fini
• full

Comments

The union with A138100 gives the first 120 terms of A000027.

Examples

			Starts with 3 and 4 of the 2nd row (Li and Be). Next come 13 to 20 of the 4th row (Al to Ca).
		

Links

• Albert Tarantola, PSE of Elements (Janet form).
• Anonymous, Janet periodic table, Web Elements Chemistry Nexus

Crossrefs

Cf. A000027, A138100 (odd-indexed rows), A138509 (Left-step Janet periodic table), A137583, A172002.

Programs

Mathematica

Table[Range[2 Ceiling[n/2]^2] + (# + 1) (3 + 2 #^2 + 4 # - 3 (-1)^#)/12 &[n - 1], {n, 2, 8, 2}] // Flatten (* Michael De Vlieger, Jul 21 2016 *)

Extensions

Edited by R. J. Mathar, Oct 07 2009