A025554 a(n) = (Sum_{i=0..n-1} (-1)^i/b(i)) * LCM{b(i): i=0..n-1}, where b(i) = C(i,floor(i/2)).

1, 0, 1, 1, 2, 7, 17, 107, 113, 329, 334, 3644, 3659, 47462, 95029, 94973, 95001, 1614765, 1614891, 30681669, 30682299, 30681969, 30682134, 705687102, 705688092, 3528437886, 3528439173, 10585315517, 10585316518, 306974164007, 613948343029

Offset

1,5

Links

Table of n, a(n) for n=1..31.

Crossrefs

Sequence in context: A225806 A283754 A122382 * A285810 A028888 A082627

Adjacent sequences: A025551 A025552 A025553 * A025555 A025556 A025557

Keyword

nonn

Author

Clark Kimberling

Extensions

Title corrected by Sean A. Irvine, Sep 05 2019

Status

approved