34827

Appears in sequences

• Numbers k such that k^2 contains only digits {1,2,9}.at n=5A053888
• Expansion of o.g.f. (1-x^2+x^4)/((1-x)^2*(1-x^2)^4*(1-x^3)^4).at n=20A123991
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having height k (1 <= k <= n).at n=48A129161
• a(1) = 2; a(n) is twice the previous term if it is prime, otherwise the previous term minus its lowest prime factor plus one.at n=43A180625
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1)^2, where a(0) = 3, a(1) = 4, b(0) = 1, b(1) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=15A296256
• Expansion of e.g.f. exp( exp(x) + sinh(x) - 1 ).at n=8A352617