23698

Appears in sequences

• a(n) = floor( Gamma(n+3/4) ).at n=8A014514
• Nearest integer to Gamma(n+3/4).at n=8A014522
• "DIK" (bracelet, indistinct, unlabeled) transform of 1,3,5,7...at n=11A032288
• Indices of prime Perrin numbers; values of n such that A001608(n) is prime.at n=29A112881
• Maximal number of regions obtained by a straight line drawing of the complete bipartite graph K_{n,n}.at n=17A117717
• Numbers n such that 1 - Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0.at n=17A130643
• Numbers n such that 1 + S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)^n; S(0)=0, n=>1.at n=11A131196
• 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, 1, -1), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.at n=9A149867
• Proceed counterclockwise on the outer keys of a numeric keypad (i.e., 1,2,3,6,9,8,7,4): first single digits, then concatenate two digits, then three, etc.at n=33A249182
• Numbers k such that Bernoulli number B_{k} has denominator 498.at n=35A282773
• Floor(Gamma(n/4)).at n=34A285000
• Expansion of Product_{k>=1} (1 + x^(2*k-1))^(k*(k-1)/2).at n=33A294777
• For any number n > 0, let f(n) be the polynomial of a single indeterminate x where the coefficient of x^e is the prime(1+e)-adic valuation of n (where prime(k) denotes the k-th prime); f establishes a bijection between the positive numbers and the polynomials of a single indeterminate x with nonnegative integer coefficients; let g be the inverse of f; a(n) = g(f(n)^2).at n=33A297473