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A249947
Number of available orbitals at increasing subshells in multi-electron atoms.
2
1, 1, 3, 1, 3, 1, 5, 3, 1, 5, 3, 1, 7, 5, 3, 1, 7, 5, 3
OFFSET
1,3
COMMENTS
Follows electron configuration in a multi-electron atom, which is: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p. Each s subshell holds 1 orbital, each p holds 3 orbitals, each d holds 5 orbitals, and each f holds 7 orbitals.
Theoretically, the integers follow the pattern infinitely, but (conjecturally) the subshells stop after 7p, with 8s not existing as predicted.
EXAMPLE
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d
7s 7p
(8s)
Read antidiagonals.
CROSSREFS
Cf. A167268.
Sequence in context: A309425 A218355 A103790 * A193583 A331731 A309891
KEYWORD
nonn,full,fini
AUTHOR
Max Alweiss, Nov 08 2014
STATUS
approved