OFFSET
0,5
REFERENCES
V. Jovovic, On the number of m-place relations (in Russian), Logiko-algebraicheskie konstruktsii, Tver, 1992, 59-66.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..18 (terms n=1..16 from Andrew Howroyd)
E. M. Palmer, On the number of n-plexes, Discrete Math., 6 (1973), 377-390. [The numbers are incorrect]
FORMULA
a(n) = 1 + Sum_{i=1..n} A301922(i, 4). - Andrew Howroyd, Aug 09 2019
CROSSREFS
KEYWORD
nonn,nice
AUTHOR
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Aug 20 2019
STATUS
approved