A137508 Successive structures of alkaline earth metals (periodic table elements from 2nd column).

2, 2, 2, 8, 2, 2, 8, 8, 2, 2, 8, 18, 8, 2, 2, 8, 18, 18, 8, 2, 2, 8, 18, 32, 18, 8, 2

Offset

1,1

Comments

Apparently a(n) = A168281(n+1). - Georg Fischer, Nov 11 2021

Links

Table of n, a(n) for n=1..27.

Example

27 terms: 2, 2 for beryllium, ... Every structure is palindromic (even and odd mixed). Also 2*A106314.

Crossrefs

Cf. A005993, A099956, A168281. Same numbers as in A093907.

Sequence in context: A132697 A160689 A179976 * A055921 A029605 A367189

Adjacent sequences: A137505 A137506 A137507 * A137509 A137510 A137511

Keyword

nonn

Author

Paul Curtz, Apr 23 2008

Status

approved