18385

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 99.at n=14A020438
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 8.at n=36A031421
• 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, 0, 0), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.at n=8A149624
• Number of UDUD's in all Dyck paths of semilength n with no UUU's and no DDD's (U=(1,1), D=(1,-1)).at n=12A166290
• Expansion of g.f. 1/ (1-x^1*(1-x^(m+1))/ (1-x^2*(1-x^(m+2))/ (1- ... ))) for m=8.at n=20A185648
• a(n) = round( (e/2)^n ).at n=35A230580
• E.g.f. A(x) satisfies: [x^n] A(x)^(n^2) = n^2 * [x^(n-1)] A(x)^(n^2) for n>=1.at n=4A300590
• Numbers k such that 363*2^k+1 is prime.at n=25A323006
• Number of ways to write n as an ordered sum of 5 nonprime numbers.at n=47A341482