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

1,3

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Richard P. Brent, Tables of T[r,k] and A[r,k], (1970) [unpublished].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

Formula

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

Maple

See A381083.

Crossrefs

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

Sequence in context: A333456 A377700 A348244 * A066220 A348152 A367854

Adjacent sequences: A381082 A381083 A381084 * A381086 A381088 A381089

Keyword

nonn,new

Author

R. J. Mathar, Feb 13 2025

Status

approved