OFFSET
2,1
REFERENCES
Roger W. Carter, Finite Groups of Lie Type: Conjugacy Classes And Complex Characters. Wiley, 1985. [see p. 376, Proposition 11.4.4]
LINKS
Eric M. Schmidt, Table of n, a(n) for n = 2..1000
PROG
(Sage) def A234254(n) : return (PartitionTuples(2, n).cardinality() + is_even(n)*3*Partitions(n//2).cardinality())//2
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric M. Schmidt, Dec 22 2013
STATUS
approved