33866

Appears in sequences

• Fixed points of the mapping k -> abs(reverse(lpd(k))-reverse(Lpf(k))). lpd(k) is the largest proper divisor and Lpf(k) is the largest prime factor of k.at n=1A076426
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative even determinant.at n=17A210371
• The Collatz (3x+1) iteration in A220145 converted to decimal.at n=21A221468
• Answer to Red, Green and Blue Tiles Problem.at n=20A244281
• p-INVERT of the upper Wythoff sequence (A001950), where p(S) = 1 - S.at n=7A289974
• Numbers k such that sigma(k) = sigma(k+19), where sigma(k) is the sum of the divisors of k.at n=17A321533
• Number of ways to write n as an ordered sum of 7 nonprime numbers.at n=32A341484