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A210762
Triangle read by rows in which row n lists the positive integers smaller than the currently largest number in Recamán's sequence A005132 after the n-th stage, but not yet present in Recamán's sequence.
2
2, 2, 4, 5, 4, 5, 4, 5, 4, 5, 8, 9, 10, 11, 12, 4, 5, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 4, 5, 8, 9, 10, 14, 15, 16, 17, 18, 19, 4, 5, 8, 9, 10, 14, 15, 16, 17
OFFSET
2,1
COMMENTS
The number of positive integers in row n is A210612(n).
EXAMPLE
Written as an irregular triangle:
2;
2, 4, 5;
4, 5;
4, 5;
4, 5, 8, 9, 10, 11, 12;
4, 5, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19;
4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19;
4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19;
4, 5, 8, 9, 10, 14, 15, 16, 17, 18, 19;
MAPLE
A210762 := proc(n)
local L, maxa ;
rec := [seq(A005132(j), j=0..n)] ;
maxa := max(op(rec)) ;
L := [] ;
for i from 0 to maxa do
if not member(i, rec) then
L := [op(L), i] ;
end if;
end do;
if nops(L) = 0 then
return [0] ;
end if;
L ;
end proc:
seq(op(A210762(n)), n=1..11) ; # R. J. Mathar, Apr 01 2012
CROSSREFS
KEYWORD
nonn,tabf,less
AUTHOR
Omar E. Pol, Mar 25 2012
STATUS
approved