278278
domain: N
Appears in sequences
- Numbers k such that k | 10^k + 10.at n=29A015902
- a(n) = (n+1)*(n+2)^2*(n+3)*(n+4)*(5*n^2 + 18*n + 15)/720.at n=10A107962
- Smallest number k such that k*n +/- 1, k*n^2 +/- 1, and k*n^3 +/- 1 are three sets of twin primes. a(n) = 0 if no such number exists.at n=38A239021
- Number of 3 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.at n=19A266429
- G.f. A(x) satisfies: A(x) = 1 + x*A(x)^3 - x^2/A(x)^7.at n=9A295533