18645
domain: N
Appears in sequences
- Numbers whose base-5 representation contains exactly three 0's and three 4's.at n=18A045217
- Numbers k such that 67*2^k-1 is prime.at n=11A050559
- Numbers k such that k and 2*k, taken together are pandigital.at n=11A115922
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 1)}.at n=8A149575
- E.g.f.: T(T(T(x))), where T(x) = -LambertW(-x) is Euler's tree function (A000169).at n=4A227278
- Numbers, p, that generate the prime quadruplets p^2-2p+2k (for k = -2, -1, 1, 2).at n=5A247882
- Table of coefficients in the iterations of Euler's tree function (A000169), as read by antidiagonals.at n=32A274390
- Table of coefficients in the iterations of Euler's tree function (A000169), as read by antidiagonals.at n=31A274740
- p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S^2 - S^3.at n=12A291233