48934

Appears in sequences

• Number of binary rooted trees with n nodes and height exactly 8.at n=19A036597
• Composite numbers k such that k!/k# + 1 is prime, where k# = primorial numbers A034386.at n=23A049420
• Numbers k such that k!/k# + 1 is prime, where k# is the primorial function (A034386).at n=30A140294
• Total number of line segments between points visible to each other in a square n X n lattice.at n=19A141255
• 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, 0, -1), (1, 0, 0), (1, 0, 1)}.at n=9A150061
• Records in A171898.at n=27A309813
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=2} (n-|i|)*(n-|j|)/8.at n=39A331773
• Numbers k such that w(k-2), w(k-1), and w(k) are all odd, where w is A336957.at n=20A338070
• Bisection of main diagonal of A115009.at n=9A358297