A198070 a(n) = round((n+1/n)^5).

32, 98, 412, 1387, 3802, 8918, 18593, 35409, 62785, 105101, 167817, 257593, 382409, 551685, 776401, 1069217, 1444593, 1918909, 2510585, 3240201, 4130616, 5207092, 6497408, 8031984, 9844000, 11969516, 14447592, 17320408

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..10000

Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1).

Formula

a(n) = n*(n^4+5*n^2+10) = A197904(n)-1 for n>20. - Bruno Berselli, Oct 27 2011

Prog

(Magma) [Round((n+1/n)^5): n in [1..60]];
(PARI) a(n)=round((n+1/n)^5) \\ Charles R Greathouse IV, Oct 27 2011

Crossrefs

Cf. A014056, A197904.

Sequence in context: A287925 A039519 A190176 * A197904 A273554 A218901

Adjacent sequences: A198067 A198068 A198069 * A198071 A198072 A198073

Keyword

nonn,easy

Author

Vincenzo Librandi, Oct 21 2011

Status

approved