OFFSET
0,3
COMMENTS
a(n) ~ C*2^n with C = .628740040499836347322149351427942214993040272834319137309763934148261658865450483387401211931448206862363011518639795861651335671171128757390830637095743647323023978906898507225697249070040926830707343373261272274541864052203777...
MATHEMATICA
a[0] = 1; a[n_] := a[n] = Block[{d = Divisors[n], l = DivisorSigma[0, n], k = 1, s = 0}, While[k < l + 1, s = s + a[ Abs[ n/d[[k]] - d[[k]] ]]; k++ ]; s]; Table[a[n], {n, 0, 32}]
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Jan 25 2003
EXTENSIONS
More terms from Benoit Cloitre and Robert G. Wilson v, Jan 27 2003
STATUS
approved