31677

Appears in sequences

• a(n) = index of the triangular number A076971(n).at n=28A076972
• Number of 0..4 arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.at n=4A200834
• T(n,k)=Number of 0..k arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.at n=32A200838
• Number of 0..n arrays x(0..6) of 7 elements without any two consecutive increases or two consecutive decreases.at n=3A200842