-206

Appears in sequences

• a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=0, a(1)=0, a(2)=1.at n=21A057597
• Ooguri-Vafa invariants of disk degeneracies for brane I or brane II in the O(K) -> P^2 geometry.at n=3A061637
• Expansion of g.f. (x^3+x^2+2*x+1)/(x^4+5*x^2+1).at n=7A101463
• Sequence is {a(3,n)}, where a(m,n) is defined at sequence A110665.at n=19A110668
• Expansion of k(q) = r(q) * r(q^2)^2 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=55A112274
• Expansion of 1 + k(q) = 1 + r(q) * r(q^2)^2 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=56A112803
• Triangle read by rows. Let g(n) = n if n is a prime, otherwise g(n) = 1. Let p(0) = 1, p(n) = g(n)*p(n-1). Row n gives coefficients of Product_{j=0..n} (x - p(j)), with row 0 = {1}.at n=18A118686
• Expansion of phi(x) * psi(x^4) * phi(-x^4)^4 in powers of x where phi(), psi() are Ramanujan theta functions.at n=69A128711
• Numerator of Hermite(n, 3/11).at n=2A159307
• Numerator of Hermite(n, 13/21).at n=2A159762
• Row sums of triangle A161363.at n=17A161375
• a(n) = -n^3 + 7*n^2 - 5*n + 1.at n=9A161708
• Diagonal sums of the Riordan array (1-4*x+4*x^2, x*(1-2*x)) (A167431).at n=11A167434
• Sequence of coefficients arising in study of generating function for A067619.at n=25A186545
• Let F(x) = 1 + 1*x + 4*x^2 + 10*x^3 + ..., the g.f. for A000293 (solid partitions), and write F(x) = 1/Product_{n>=1} E(n)^a(n) where E(n) = Product_{k>=n} (1 - x^(n*k)).at n=14A193718
• Expansion of psi(x)^2 * phi(-x^2)^4 in powers of x where phi(), psi() are Ramanujan theta functions.at n=34A228831
• Expansion of psi(x)^2 * phi(-x^2)^4 in powers of x where phi(), psi() are Ramanujan theta functions.at n=48A228831
• a(n) = Sum_{k=1..n} prime(k) * s(k), where s(k) = (-1)^(floor(k/2)).at n=46A233809
• Expansion of (1-q)^k/Product_{j=1..k} (1-q^j) for k=6.at n=43A275640
• a(n) = det M_n where M_n is the n X n matrix m(i,j) = A000041(i+j).at n=51A278838