A258057 First differences of the arithmetic derivative sequence A003415.
0, 1, 0, 3, -3, 4, -4, 11, -6, 1, -6, 15, -15, 8, -1, 24, -31, 20, -20, 23, -14, 3, -12, 43, -34, 5, 12, 5, -31, 30, -30, 79, -66, 5, -7, 48, -59, 20, -5, 52, -67, 40, -40, 47, -9, -14, -24, 111, -98, 31, -25, 36, -55, 80, -65, 76, -70, 9, -30, 91, -91, 32, 18
Offset: 0
Links
- Alois P. Heinz, Table of n, a(n) for n = 0..10000
Programs
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Haskell
a258057 n = a258057_list !! n a258057_list = zipWith (-) (tail a003415_list) a003415_list -- Reinhard Zumkeller, Jun 10 2015
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Maple
d:= n-> n*add(i[2]/i[1], i=ifactors(n)[2]): a:= n-> d(n+1)-d(n): seq(a(n), n=0..105);
Comments