-251

Appears in sequences

• Expansion of square of continued fraction 1/ ( 1+q/ ( 1+q^2/ ( 1+q^3/ ( 1+q^4/... )))).at n=38A055101
• McKay-Thompson series of class 84a for Monster.at n=53A058761
• a(n) = bin_prime_sum(fibonacci(A001651[n])), where fibonacci(A001651[n]) is A014437[n].at n=30A059878
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 3.at n=56A060022
• Generalized Catalan numbers C(-4; n).at n=4A064326
• Triangle composed of generalized Catalan numbers.at n=40A064334
• Inverse binomial transform of A064413.at n=8A065972
• First order recursion: a(0)=1; a(n) = sigma(1,n) - a(n-1).at n=37A083238
• Expansion of -x - x^3*(2 -2*x^4 +x^5)/((1-x^2)*(1+x+x^4)).at n=18A089076
• Matrix inverse of triangle A107862.at n=32A107865
• Determinants of 3 X 3 matrices of continuous blocks of 9 consecutive semiprimes.at n=2A118781
• The triangle K referred to in A038200, read along rows.at n=49A126713
• Triangle read by rows: A007318^(-1) * A128540.at n=53A128586
• a(n)=-a(n-1)+4*a(n-2)+4*a(n-3).at n=8A136249
• Expansion of (1-2x-5x^2-7x^3+x^6)/((1-x)(1-x^3)^2).at n=18A141352
• Expansion of (1-5x^2-7x^3-2x^4+x^6)/((1-x)(1-x^3)^2).at n=19A141365
• The main diagonal of the array of A141425 and its higher order differences.at n=8A141516
• Expansion of chi(-x^5) / chi(-x^2) in powers of x where chi() is a Ramanujan theta function.at n=55A145706
• a(n) = 1 + 3*n - 2*n^2.at n=12A168244
• A symmetrical triangle sequence based on:q=1/12;t(n,m,q)=12*(Binomial[n, m]*(1 - q) + (((n + m + 1)!/((n + 1)!* m!)) + ((2*n - m + 1)!/((n + 1)!*(n - m)!)))*q).at n=17A174948