117964
domain: N
Appears in sequences
- a(n) = A080313(n)/2.at n=9A080315
- a(n) = 4 * floor(9*2^n/5).at n=14A102653
- Number of n-digit numbers that are divisible by 5^n.at n=16A151754
- Composite numbers k such that k*phi(k) is in A002378.at n=24A256545
- a(n) = a(n-2) + 4*a(n-3) - 4*a(n-5), where a(0) = 1, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 19, a(5) = 28.at n=23A297554
- Number of binary partitions of n into three kinds of parts.at n=24A373309
- a(n) = (n^2 - n + 2) * (5*n^2 - 5*n + 2) / 4.at n=17A380353