51990

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 76.at n=5A031754
• Numbers m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,23.at n=5A064248
• a(n) = Sum_{i=1..n} binomial(i+5,6)^2.at n=4A086027
• Number triangle of sums of squared binomial coefficients.at n=61A110197
• Expansion of g.f.: 1/(1 - x - 2*x^2 + x^3 + x^4 + 2*x^7 - 5*x^9 + 2*x^11 + x^14 + x^15 - 2*x^16 - x^17 + x^18).at n=23A147622
• a(n) = 36*n^2 + 6.at n=37A158479