A146952 - OEIS

%I #6 Jan 03 2020 21:16:30

%S 0,3,6,12,17,26,33,45,54,69,80,2,111,132,3,171,188,215,234,264,285,

%T 318,341,377,402,9,468,510,11,584,615,663,696,747,782,836,873,930,969,

%U 3,1070,1133,24,1242,1287,1356,1403,1475,1524,1599,1650,1728,1781,38

%N a(n) = A146950(n)/40.

%C A061047(n) is divisible by 10 iff n is 3 or 7 mod 10. In this case, A061047(n) is also divisible by 40. - _Andrew Howroyd_, Jan 03 2020

%H Andrew Howroyd, <a href="/A146952/b146952.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A061047(5*n + 3 - (n mod 2)). - _Andrew Howroyd_, Jan 03 2020

%o (PARI) a(n)={my(t=5*n + 3 - n%2); numerator(1/49 - 1/t^2)/40} \\ _Andrew Howroyd_, Jan 03 2020

%Y Cf. A061047, A146950.

%K nonn

%O 1,2

%A _Paul Curtz_, Nov 03 2008

%E Offset corrected and terms a(11) and beyond from _Andrew Howroyd_, Jan 03 2020