1,2

Sequence A002686 has only 10 terms (from n = 1 to n = 10). We have a(n) = A002686(n) for 1 <= n <= 10 except for n = 7: a(7) = 229026 while A002686(7) = 1603182 (which is a(7) * 7 = 229026 * 7). For an explanation, see the comments for array A324124. This is necessary to give a unique definition to the terms of array A324124.

Petros Hadjicostas, Maple program.

Yudell L. Luke, Mechanical quadrature near a singularity, Math. Comp. 6 (1952), 215-219.

Cf. A002685, A002686, A324124, A328866, A328884.

Sequence in context: A006887 A009369 A120044 * A002686 A306047 A110348

Adjacent sequences: A328882 A328883 A328884 * A328886 A328887 A328888

Petros Hadjicostas, Oct 29 2019

approved