A024387 [ (4th elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 4}.

20, 319, 1850, 6962, 20344, 50198, 109666, 218483, 404885, 707740, 1178937, 1885998, 2914945, 4373393, 6393898, 9137529, 12797693, 17604194, 23827533, 31783445, 41837686, 54411045, 69984609, 89105263, 112391425, 140539035

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Formula

a(n) = floor(A024380(n) / A000384(n + 3)). - Sean A. Irvine, Jul 06 2019

Crossrefs

Sequence in context: A011197 A054621 A111778 * A307173 A101310 A229775

Adjacent sequences: A024384 A024385 A024386 * A024388 A024389 A024390

Keyword

nonn

Author

Clark Kimberling

Status

approved