53872

Appears in sequences

• Expansion of 1/((1+x)*(1-x)^6).at n=23A001753
• arcsin(exp(x)-cos(x))=x+2/2!*x^2+2/3!*x^3+12/4!*x^4+80/5!*x^5...at n=7A013311
• Relative class number h- of cyclotomic field Q(zeta_n) where n runs through positive integers not congruent to 2 (mod 4) [A042965, but omitting the initial 0].at n=67A061494
• Triangle read by rows: T(n,k) is number of Dyck paths of semilength n having k ascents of length 1 that start at an odd level.at n=57A102405
• Number of Dyck paths of semilength n having no ascents of length 1 that start at an odd level.at n=12A102407
• Numbers k with property that 6*k+1 is prime and uses only digits 2 and 3.at n=6A153166
• a(n) = (2*n^3 + 5*n^2 - 11*n)/2.at n=36A162257
• Triangle t(n,m) = p(n)/ (p(m)*p(n-m) ) read by rows, where p(n>=1) = 1, -1, 2, 10, 10, -160, -2080,.. are partial products of A106852.at n=49A177694
• Triangle t(n,m) = p(n)/ (p(m)*p(n-m) ) read by rows, where p(n>=1) = 1, -1, 2, 10, 10, -160, -2080,.. are partial products of A106852.at n=50A177694
• Main diagonal of A291701.at n=12A291702
• Expansion of e.g.f. -log(1 - x) * exp(2*x).at n=8A346394