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A334688
Numbers missing from Pascal's spiral A334742.
2
9, 11, 13, 15, 16, 18, 19, 21, 22, 24, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 63, 64, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80
OFFSET
1,1
LINKS
MAPLE
V:= Array(-10..10, -10..10): t:=1:
i:= 1: j:= 0: V[0, 0]:= 1: R:= NULL:
do
u:= V[i-1, j]+V[i+1, j]+V[i, j-1]+V[i, j+1];
V[i, j]:= u;
R:= R, $(t+1)..(u-1);
t:= u;
if u > 100 then break fi;
if j > -i and j < i then j:= j+1
elif i > -j and i <= j then i:= i-1
elif i < j and j <= -i then j:= j-1
else i:= i+1
fi;
od:
R; # Robert Israel, May 15 2020
CROSSREFS
Cf. A334742.
Sequence in context: A158607 A070699 A065454 * A248629 A008558 A335912
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 10 2020
STATUS
approved