23166

Appears in sequences

• Even elements in the 5-Pascal triangle A028313.at n=53A028317
• Distinct even elements in the 5-Pascal triangle A028313.at n=30A028320
• Central elements in the 5-Pascal triangle A028313.at n=8A028322
• Distinct even numbers in the numerators of the 1/5-Pascal triangle (by row).at n=36A046626
• Distinct even numbers in writing numerators of each element to the right of the central elements of the 1/5-Pascal triangle (by row).at n=26A046629
• Numbers k such that k^2 contains only digits {3,5,6}.at n=5A053944
• a(n)^2 + 1 is largest prime of the form x^2 + 1 <= 2^n.at n=28A083848
• Triangle read by rows: T(n,k) is number of Dyck paths of semilength n having k ascents of length 3 (0<=k<=floor(n/3)). Also number of ordered trees with n edges that have k vertices of outdegree 3.at n=38A114506
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 6.at n=46A136974
• Minimal covering numbers.at n=19A160559
• Consider asymmetric 1-D random walk with set of possible jumps {-1,+1,+2}. Sequence gives number of paths of length n ending at origin.at n=13A176806
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-2,0,1,2}, n=3*r+p_i, and define a(-2)=1. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,1,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^2-1) with x=2*cos(Pi/9).at n=40A187499
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-2,0,1,2}, n=3*r+p_i, and define a(-2)=0. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,3,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^2-1) with x=2*cos(Pi/9).at n=37A187501
• Number of nondecreasing strings of numbers x(i=1..n) in -3..3 with sum x(i)^3 equal to 0.at n=41A188271
• A Catalan triangle by rows.at n=57A203717
• Positions of record high water marks in A246024.at n=38A246026
• Numbers m such that the result of prepending a zero digit to m, removing the least significant digit D, and prepending D, is divisible by m.at n=41A256005
• Wiener index of the n X n king graph.at n=9A292053
• Number of ordered rooted trees with n non-root nodes such that the maximal outdegree equals three.at n=8A303271
• Floor of area of triangle whose sides are consecutive Ulam numbers (A002858).at n=44A330909