experimental-projects/oeis-research/Daniel Suteu/Irregular triangle read by rows of integers k such that n AND k = k, for k = 1..n/prog.sf

#!/usr/bin/ruby

# Plot as:
#   sidef prog.sf | gnuplot -p -e 'plot "/dev/stdin"'

var upto = 100

for n in (1..upto) {
    1..n -> grep {|k| n&k == k }.each { .say }
}