208560

Appears in sequences

• Octagonal numbers for which the sum of the digits is also an octagonal number.at n=22A117082
• Octagonal numbers for which both the sum and the product of the digits is also an octagonal number.at n=11A117084
• Number of -4..4 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having three or four distinct values for every i<=n and j<=n.at n=4A211691
• Number of (w,x,y,z) with all terms in {1,...,n} and w>2x and y<=3z.at n=32A212517
• Number of Motzkin meanders of length n with an even number of peaks.at n=13A307575
• Primorial deflation of the n-th colossally abundant number: the unique integer k such that A108951(k) = A004490(n).at n=35A342012