37712

Appears in sequences

• Numbers k > 1 such that, in base 6, k and k^2 contain the same digits in the same proportion.at n=25A061660
• a(1) = 1. a(n) = sum of the earlier terms of the sequence, a(k), where GCD(n,a(k)) is <= k, for 1 <= k <= n-1.at n=19A119990
• Triangle T, read by rows, where column k of T = column 0 of matrix power T^(k+1) for k>0, with column 0 of T = column 1 of T^2 (shifted).at n=39A152406
• Column 3 of triangle A152406; also, column 0 of matrix 4th power of A152406.at n=5A152410
• The second arithmetic derivative of primorial numbers.at n=7A369651