A016840 a(n) = (4*n+3)^4.

81, 2401, 14641, 50625, 130321, 279841, 531441, 923521, 1500625, 2313441, 3418801, 4879681, 6765201, 9150625, 12117361, 15752961, 20151121, 25411681, 31640625, 38950081, 47458321, 57289761

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy
• changed

Links

• Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

Programs

Mathematica

(4*Range[0,30]+3)^4 (* or *) LinearRecurrence[{5,-10,10,-5,1},{81,2401,14641,50625,130321},30] (* Harvey P. Dale, Dec 08 2011 *)

Formula

a(n) = 5*a(n-1)- 10*a(n-2)+10*a(n-3)-5*a(n-4)+a(n-5). - Harvey P. Dale, Dec 08 2011