A098135 a(h) = d(h,j) = lcm( f(h,j,1) ... f(h,j,h) ), when j=3.

1, 5, 9, 455, 2618, 315, 271700, 56751695, 6930, 3708514810, 32152414840, 135135, 19749267715100, 314645828225300, 34918884, 113543477411038675, 473930651619825400, 669278610, 467655703593591713200

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Formula

Given f(h, j, a) = ( [ ((a/gcd(a, h)) / gcd(j+1, (a/gcd(a, h)))) * (h(j+1)) ] - [ ((a/gcd(a, h)) / gcd(j+1, (a/gcd(a, h)))) * (ja) ]) / a then let a(h) = d(h, j) = lcm( f(h, j, 1) ... f(h, j, h) )

Example

a(2) = 5 = lcm(5,1)
a(3) = 9 = lcm(9,3,1)
a(5) = 2618 = lcm(17,7,11,2,1)
a(11) = 32152414840 = (41,19,35,8,29,13,23,5,17,7,1)

Crossrefs

Cf. A091342, A025558, A097382.

Sequence in context: A109076 A101683 A348132 * A112259 A357280 A370131

Adjacent sequences: A098132 A098133 A098134 * A098136 A098137 A098138

Keyword

nonn

Author

Scott C. Macfarlan (scottmacfarlan(AT)covance.com), Sep 27 2004

Status

approved