42036

Appears in sequences

• Numbers k such that k concatenated with k+4 gives the product of two numbers which differ by 9.at n=3A116190
• Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five, six, seven or eight distinct values for every i,j,k<=n.at n=6A211599
• Number of nondecreasing sequences of 4 1..n integers with no element dividing the sequence sum.at n=33A212871
• a(n) is the number of n-digit numbers divisible by their last digit.at n=4A301803