18547

Appears in sequences

• a(n) is the (n+1)st (n+2)-gonal number.at n=33A064808
• Integers n > 10583 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10583.at n=14A066055
• Interprimes which are of the form s*prime, s=17.at n=8A075292
• INVERT transform of A118434, = row sums of triangle A144182.at n=18A144181
• E.g.f.: exp( Sum_{n>=1} Pell(n)*x^n/n ), where Pell(n) = A000129(n).at n=6A244432
• Number of n X 3 nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=23A252831
• 35-gonal numbers: a(n) = n*(33*n-31)/2.at n=34A282851
• a(n) is the greatest integer k such that k/Fibonacci(n) < 2/5.at n=24A293639
• a(n) is the integer k that minimizes |k/Fibonacci(n) - 2/5|.at n=24A293641
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n-1)*b(n), where a(0) = 2, a(1) = 3, b(0) = 1, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=10A296281
• G.f. A(x) satisfies: A(x) = 1 + x * A(x/(1 - x)^5) / (1 - x)^5.at n=6A351818