OFFSET
1,1
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..10000
Michael Engen and Vincent Vatter, Containing all permutations, Amer. Math. Monthly, 128 (2021), 4-24; arXiv preprint, arXiv:1810.08252 [math.CO], 2018-2020.
MATHEMATICA
Array[Ceiling[#^2 - 7 #/3 + 19/3] &, 53] (* Michael De Vlieger, Apr 07 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 13 2021
STATUS
approved