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A181849 Row sums of A181851 3
1, 3, 8, 19, 49, 112, 273, 631, 1450, 3327, 7571, 17170, 38519, 85951, 190392, 419759, 921189, 2013874, 4385889, 9516273, 20577618, 44352499, 95324853, 204307052, 436768151 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MAPLE
with(combstruct):
a181849 := proc(n) local k, L, l, R, comp;
R := NULL; L := 0;
for k from 1 to n do
comp := iterstructs(Composition(n), size=k):
while not finished(comp) do
l := nextstruct(comp);
L := L + ilcm(op(l));
od;
od;
L end:
MATHEMATICA
c[n_, k_] := Permutations /@ IntegerPartitions[n, {k}] // Flatten[#, 1]&; t[n_, k_] := Total[LCM @@@ c[n, k]]; Table[Print[s = Sum[t[n, k], {k, 1, n}]]; s, {n, 1, 25}] (* Jean-François Alcover, Feb 05 2014 *)
CROSSREFS
Sequence in context: A296329 A339525 A295045 * A164586 A018032 A086808
KEYWORD
nonn
AUTHOR
Peter Luschny, Dec 07 2010
EXTENSIONS
a(23)-a(25) from Alois P. Heinz, Jul 29 2013
STATUS
approved

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Last modified March 29 09:32 EDT 2024. Contains 371268 sequences. (Running on oeis4.)