183960
domain: N
Appears in sequences
- Base 3 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=11A033139
- Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 3,1,0.at n=5A037665
- Numbers k that, when expressed in base 5 and then interpreted in base 9, give a multiple of k.at n=36A062931
- a(0) = 1, a(n) = 20*sigma[3](n).at n=20A091983
- a(0)=1, a(n) = sigma_3(2n).at n=27A091986
- a(0)=1, a(n) = sigma_3(3n).at n=18A092341
- a(n) = 8000*n - 40.at n=22A157660
- Record gaps between nonprime prime powers.at n=35A167186
- Number of distinct (unordered) pairs of partitions of an 8-element set that have Rand distance n.at n=3A192098
- Coefficients in q-expansion of (E_2*E_4 - E_6)/720, where E_2, E_4, E_6 are the Eisenstein series shown in A006352, A004009, A013973, respectively.at n=20A281372
- Product of first n terms of continued fraction expansion of Pi.at n=8A331583
- Product of first n terms of continued fraction expansion of Pi.at n=9A331583
- E.g.f. satisfies A(x) = 1 + x*A(x)*exp(x^3*A(x)^3).at n=7A365287