OFFSET
1,2
LINKS
Vaclav Kotesovec and Alois P. Heinz, Table of n, a(n) for n = 1..100 (terms n=1..36 from Vaclav Kotesovec)
J. D. Horton and A. Kurn, Counting sequences with complete increasing subsequences, Congressus Numerantium, 33 (1981), 75-80. MR 681905
FORMULA
a(n) ~ 7^(7*n + 1/2) / (2*Pi*n)^3. - Vaclav Kotesovec, Feb 21 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 14 2016
STATUS
approved