A381085 Column k=2 of Brent's table A381083 related to prime gaps 2n.

0, 0, 2, 4, 6, 56, 40, 40, 92, 624, 504, 10880, 6688, 7400, 19312, 113792, 122400, 3979008, 2239104, 2915840, 5777920, 56689920, 55372800, 110218240, 78453760, 65815552, 125480960, 2057036800, 1776107520, 137449159680, 56911196160, 54069370880, 127085826560, 63757824000, 96876953600, 4341200912384, 2258481971200, 2411472967680, 5056905641984, 122267833425920

Offset: 1

Author

R. J. Mathar, Feb 13 2025

Keywords

• nonn

Links

• R. J. Mathar, Table of n, a(n) for n = 1..717
• Richard P. Brent, Tables of T[r,k] and A[r,k], (1970) [unpublished].
• Richard P. Brent, The distribution of small gaps between successive primes, Mathematics of Computation 28 (1974), 315-324. JSTOR 2005842

Crossrefs

Cf. A381083 (irreg. triangle), A381084 (k=1), A381086 (k=3).

Programs

Maple

See A381083.

Formula

a(n) = A381083(n,2).