77874

Appears in sequences

• Number of -5..5 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=6A199906
• T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=61A199909
• Number of -n..n arrays x(0..6) of 7 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=4A199914
• Triangle read by rows: T(n,k) is the number of 2k-cycles in the n X n grid graph (2 <= k <= floor(n^2/2), n >= 2).at n=30A302337
• G.f.: Sum_{n>=0} (n+1) * (x + x^n)^n.at n=81A325997
• Starts of runs of 3 consecutive Zeckendorf-Niven numbers (A328208).at n=40A328210