23042

Appears in sequences

• a(0) = 1, a(n) = 40*n^2 + 2 for n>0.at n=24A010022
• Otto Haxel's guess for magic numbers of nuclear shells.at n=41A033547
• If 0 <= n <= 3 then a(n) = n(n+1)(n+2)/3, if n >= 4 then a(n) = n(n^2+5)/3.at n=41A162626
• Table a(k,i), read by antidiagonals, in which the n-th row comprises A214206(n) in position 0 followed by a second order recursive series G in which each product G(i)*G(i+1) lies in the same row of A001477 (interpreted as a square array - see below).at n=21A182439
• Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-1,0,1}.at n=29A239551
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 115", based on the 5-celled von Neumann neighborhood.at n=32A270183
• Numbers k such that Fibonacci(k) == +-1 (mod k) and k is neither 1 nor prime nor twice a prime.at n=28A279072