25692

Appears in sequences

• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=17A025503
• Numbers which are the sum of their proper divisors containing the digit 8.at n=16A059467
• a(n) = 2^n - A143658(n).at n=16A101836
• 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, 0), (-1, -1, 1), (-1, 1, 1), (0, 1, 1), (1, 0, -1)}.at n=10A148446
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (-1, 0), (0, -1), (0, 1), (1, -1)}.at n=11A151425
• Number of (n+2) X (3+2) 0..1 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..1 introduced in row major order.at n=7A238649
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..1 introduced in row major order.at n=47A238654
• Number of collinear point triples on a centered hexagonal grid of size n.at n=8A241222
• Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002).at n=29A288605
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=17A294449
• Number of (binary) max-heaps on n elements from the set {0,1} containing exactly six 0's.at n=30A326507
• G.f.: Sum_{k>=0} x^(k*(k+1)) * Product_{j=1..k} 1/(1 - x^j)^4.at n=21A376711