22075

Appears in sequences

• a(n) = Sum_{k=0..floor(n/5)} C(n-4k,k+1).at n=34A099559
• One-third of the number of n X n nonnegative integer arrays with every 3 X 3 subblock summing to 3.at n=4A145054
• The least number s > 1 having exactly n fives in the periodic part of the continued fraction of sqrt(s).at n=13A206585
• a(n) = (n + 1)*(4*n^2 + 14*n + 9)/3.at n=24A268484
• Mark each point on the n X n X n X n grid with the number of points that are visible from it; a(n) is the number of distinct values in the grid.at n=51A339947
• Starts of runs of 3 consecutive integers whose exponent of least prime factor in their prime factorization is even.at n=38A365871