A268232 Indices of 0's in A047999.

4, 11, 12, 13, 17, 18, 22, 24, 26, 37, 38, 39, 40, 41, 42, 43, 47, 48, 49, 50, 51, 52, 56, 58, 59, 60, 61, 62, 64, 70, 71, 72, 73, 79, 80, 81, 83, 84, 85, 87, 88, 89, 93, 94, 97, 98, 101, 102, 106, 108, 110, 112, 114, 116, 118, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

V:= [1, 1]: R:= NULL;
for i from 2 to 50 do
  V:= [1, op(V[1..-2]+V[2..-1] mod 2), 1];
  R:= R, op(map(`+`, select(t -> V[t]=0, [$1..i+1]), i*(i+1)/2-1));
od:
R; # Robert Israel, Apr 26 2020

Crossrefs

Cf. A047999, A268231.

Sequence in context: A281387 A355608 A098060 * A285633 A266281 A154040

Adjacent sequences: A268229 A268230 A268231 * A268233 A268234 A268235

Keyword

nonn

Author

N. J. A. Sloane, Feb 03 2016

Status

approved