A142718 Odd terms in A014217.

1, 1, 11, 17, 29, 199, 321, 521, 3571, 5777, 9349, 64079, 103681, 167761, 1149851, 1860497, 3010349, 20633239, 33385281, 54018521, 370248451, 599074577, 969323029, 6643838879, 10749957121, 17393796001, 119218851371, 192900153617, 312119004989, 2139295485799

Offset: 1

Author

Paul Curtz, Sep 27 2008

Keywords

• easy
• nonn

Links

• Index entries for linear recurrences with constant coefficients, signature (0,0,19,0,0,-19,0,0,1).

Crossrefs

Cf. A014217.

Programs

Mathematica

LinearRecurrence[{0,0,19,0,0,-19,0,0,1},{1,1,11,17,29,199,321,521,3571},30] (* James C. McMahon, Aug 11 2025 *)

Formula

a(n) = 19*a(n-3) - 19*a(n-6) + a(n-9).

Extensions

Edited by N. J. A. Sloane, Sep 27 2008

a(19)-a(30) from James C. McMahon, Aug 11 2025