38146972656
domain: N
Appears in sequences
- a(n) = (5^n - 1)/4.at n=16A003463
- Modulo 2 binomial transform of 5^n.at n=15A100308
- a(n) = Sum_{j=0..15} n^j.at n=5A105312
- a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 17.at n=4A161167
- Expansion of x*(1+5*x-5*x^3)/(1-6*x^2+5*x^4).at n=30A249222
- a(n) = (5^(2*(n + 1)) - 1)/4.at n=6A275766
- Oblong numbers that are repdigits with length > 2 in more than two bases.at n=2A309062