A033466 First differences of sequence {1/(n^2+1)} (denominators).

2, 10, 10, 170, 442, 962, 1850, 650, 5330, 8282, 12322, 17690, 986, 33490, 44522, 58082, 74530, 18850, 117650, 145162, 177242, 214370, 51410, 305810, 361202, 423802, 494210, 114610, 660970, 758642

Offset

0,1

Links

Table of n, a(n) for n=0..29.

Formula

For all n not in A016873, a(n) = n^4 + 2n^3 + 3n^2 + 2n + 2, else A099024((n-2)/5). - Ralf Stephan, Sep 25 2004

Crossrefs

Sequence in context: A066394 A232500 A351659 * A193181 A338401 A222638

Adjacent sequences: A033463 A033464 A033465 * A033467 A033468 A033469

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved