140581

Appears in sequences

• Shifts 2 places left under binomial transform.at n=13A007476
• Number of length n 0..6 arrays with new values introduced in order from both ends.at n=12A245161
• Number of length n 0..7 arrays with new values introduced in order from both ends.at n=12A245162
• G.f.: Sum_{n>=0} x^n / (1 - n*x - n^2*x^2).at n=10A249892
• Number of n X 2 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.at n=18A278670