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A146952
a(n) = A146950(n)/40.
2
0, 3, 6, 12, 17, 26, 33, 45, 54, 69, 80, 2, 111, 132, 3, 171, 188, 215, 234, 264, 285, 318, 341, 377, 402, 9, 468, 510, 11, 584, 615, 663, 696, 747, 782, 836, 873, 930, 969, 3, 1070, 1133, 24, 1242, 1287, 1356, 1403, 1475, 1524, 1599, 1650, 1728, 1781, 38
OFFSET
1,2
COMMENTS
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
LINKS
FORMULA
a(n) = A061047(5*n + 3 - (n mod 2)). - Andrew Howroyd, Jan 03 2020
PROG
(PARI) a(n)={my(t=5*n + 3 - n%2); numerator(1/49 - 1/t^2)/40} \\ Andrew Howroyd, Jan 03 2020
CROSSREFS
Sequence in context: A108757 A323645 A307042 * A288570 A038046 A345100
KEYWORD
nonn
AUTHOR
Paul Curtz, Nov 03 2008
EXTENSIONS
Offset corrected and terms a(11) and beyond from Andrew Howroyd, Jan 03 2020
STATUS
approved