A024223 [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 3}.

1, 12, 45, 115, 244, 457, 785, 1262, 1926, 2822, 3997, 5504, 7400, 9746, 12608, 16057, 20168, 25021, 30699, 37290, 44888, 53591, 63500, 74722, 87368, 101553, 117397, 135026, 154567, 176154, 199926, 226024, 254597, 285795, 319774, 356694, 396722, 440026

Offset

1,2

Links

Table of n, a(n) for n=1..38.

Formula

a(n) = floor(A024214(n) / A024212(n+2)). - Sean A. Irvine, Jun 25 2019

Crossrefs

Sequence in context: A070996 A350116 A015237 * A251720 A199211 A331764

Adjacent sequences: A024220 A024221 A024222 * A024224 A024225 A024226

Keyword

nonn

Author

Clark Kimberling

Status

approved