24530

Appears in sequences

• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = A001950 (upper Wythoff sequence).at n=25A024465
• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = A001950 (upper Wythoff sequence).at n=25A025085
• Sum of the first n safe primes.at n=35A066869
• a(1)=1, a(n) = a(n-1) + n^4 if n odd, a(n) = a(n-1) + n^2 if n is even.at n=10A140159
• 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), (0, 0, 1), (1, -1, 1), (1, 1, 0)}.at n=8A150200
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 427", based on the 5-celled von Neumann neighborhood.at n=31A271904
• Numbers k such that k and k+1 are the product of exactly four distinct primes.at n=21A318896
• a(n) is the Wiener index of a broom on 2n vertices of which n+2 are pendant.at n=30A349416
• Numbers k such that A360327(k) = A360327(k+1) > 1.at n=5A360358