30039
domain: N
Appears in sequences
- Coefficient of x^5 in expansion of (1 + x + x^2)^n.at n=16A000574
- Number of symmetric types of (5,2n)-hypergraphs under action of complementing group C(5,2).at n=5A055788
- Numbers k such that the product of Euler phi of the 2 consecutive integers {k,k+1} is a 4th power: if sqrt(sqrt(phi(k)*phi(k+1))) is an integer, then k is here.at n=11A082788
- Row sums of triangle A115237.at n=33A115238
- Enneagonal numbers for which the product of the digits is also an enneagonal number.at n=30A117052
- Decimal representation of n-th iteration of the Rule 94 elementary cellular automaton starting with a single ON cell.at n=7A118101
- Numbers of the form 110 + p^2. (where p is a prime).at n=39A138693
- Negative values along the main diagonal of the array defined by A020806 and its differences.at n=14A144472
- 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, 0), (-1, 0, 1), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.at n=8A150279
- a(n) is the smallest positive multiple of 2n-1 that contains the binary representation of n in its binary representation and that is a palindrome when written in binary.at n=28A158789
- Sums of 4 distinct primorials.at n=15A177709
- Constant term in the reduction by (x^2->x+1) of the polynomial p(n,x) defined below at Comments.at n=15A192922
- Odd numbers n such that A196189(n) is odd.at n=11A196190
- 2*A197072(n-1) - A197072(n).at n=22A197100
- Irregular triangular array T(n,k) of consecutive composites.at n=36A226085
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 395", based on the 5-celled von Neumann neighborhood.at n=14A281750
- Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 395", based on the 5-celled von Neumann neighborhood.at n=14A281751
- Numbers in base 10 that are palindromic in bases 2, 8, and 16.at n=13A319585
- Numbers n such that the arithmetic derivative of A276086(n) is prime.at n=29A328233
- Numbers obtained by reinterpreting base-2 representation of odd numbers in primorial base.at n=35A328462