19636

Appears in sequences

• a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.at n=11A067092
• Ulam's spiral (WNW spoke).at n=35A143859
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=8A150136
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (0, 1), (1, 0)}.at n=9A151280
• Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of 2 n steps taken from {(-1, -1), (-1, 0), (1, -1), (1, 1)}.at n=6A151343
• a(n) = 1 + n*(n+1)*(n-1)/2.at n=34A158842
• Numbers that are 5-digit palindromes in at least two bases.at n=24A180454
• Number of -n..n arrays x(0..5) of 6 elements with zero sum and no element more than one greater than the previous.at n=10A199850
• a(n) = time to the nearest second at the n-th instant (n>=0) when the hour and minute hands on a clock face coincide, starting at time 0:00.at n=5A335789
• a(n) = Sum_{k=1..n} k*A001168(k)*binomial(n-1,k-1), where A001168(k) is the number of fixed polyominoes with k cells.at n=6A343208