

A101437


a(1) = 1; a(n+1) = sum{k=1 to n} a(n+1k)(mod k).


0



1, 0, 1, 1, 2, 3, 3, 6, 6, 8, 11, 13, 17, 15, 25, 30, 34, 34, 46, 47, 42, 61, 72, 82, 76, 86, 93, 95, 102, 130, 145, 163, 153, 148, 172, 230, 205, 226, 214, 182, 230, 231, 272, 322, 329, 315, 340, 373, 354, 356, 378, 431, 510, 457, 498, 565, 558, 468, 528, 591, 613, 578
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OFFSET

1,5


LINKS

Table of n, a(n) for n=1..62.


EXAMPLE

a(7) = a(6)(mod 1) + a(5)(mod 2) + a(4)(mod 3) + a(3)(mod 4) + a(2)(mod 5) + a(1)(mod 6) = 0 + 0 + 1 + 1 + 0 + 1 = 3.


MATHEMATICA

a[1] = 1; a[n_] := a[n] = Sum[Mod[a[n  k], k], {k, 1, n  1}]; Table[ a[n], {n, 62}] (* Robert G. Wilson v, Jan 25 2005 *)


CROSSREFS

Sequence in context: A127779 A207634 A222862 * A039856 A143715 A159685
Adjacent sequences: A101434 A101435 A101436 * A101438 A101439 A101440


KEYWORD

nonn


AUTHOR

Leroy Quet, Jan 18 2005


EXTENSIONS

More terms from Robert G. Wilson v, Jan 25 2005


STATUS

approved



