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 A123640 Consider the 2^n compositions of n per row and mark only those ending in an odd part. 5
 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA a(n) = Mod(A065120(n),2). EXAMPLE A065120 begins 0, 1, 2, 1, 3, 2, 1, 1, 4, 3, 2, 2, 1, 1, 1, 1, ... Therefore this sequence begins 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, ... PROG (PARI) lista(nn) = {my(v = vector(nn)); v[1] = 1; for (i=2, nn, v[i] = mg(i-1)*v[(i+1)\2]; ); for (i=1, nn, print1(valuation(v[i], 2) % 2, ", "); ); } \\ Michel Marcus, Feb 09 2014 CROSSREFS Cf. A001045, A065120, A123638, A123639, A123641. Sequence in context: A096270 A159689 A174282 * A022924 A157412 A023532 Adjacent sequences:  A123637 A123638 A123639 * A123641 A123642 A123643 KEYWORD easy,nonn AUTHOR Alford Arnold, Oct 04 2006 EXTENSIONS More terms from Nathaniel Johnston, Apr 30 2011 STATUS approved

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Last modified November 18 07:01 EST 2018. Contains 317279 sequences. (Running on oeis4.)