login
A020123
Ceiling of Gamma(n+2/7)/Gamma(2/7).
2
1, 1, 1, 1, 3, 12, 63, 393, 2863, 23715, 220205, 2264966, 25561752, 314044379, 4172303890, 59604341273, 911094930877, 14837831731420, 256482519928832, 4689966078698629, 90449345803473559, 1834829586299035049
OFFSET
0,5
LINKS
FORMULA
a(n) ~ sqrt(2*Pi)*n^(n-3/14)*exp(-n)/Gamma(2/7). - Robert Israel, Jan 02 2017
MAPLE
Digits := 64:f := proc(n, x) ceil(GAMMA(n+x)/GAMMA(x)); end;
MATHEMATICA
Table[Ceiling[Gamma[n+2/7]/Gamma[2/7]], {n, 0, 30}] (* Harvey P. Dale, Nov 24 2022 *)
CROSSREFS
Cf. A220605.
Sequence in context: A121123 A361882 A372534 * A307708 A308206 A264151
KEYWORD
nonn
AUTHOR
STATUS
approved