20403

Appears in sequences

• Numbers k such that concatenating k and the sum of the digits of k raised to their own power (A045503) produces a square.at n=4A108406
• Numbers of the form x^2 + y^2 + z^2 = phi(x*y*z) + sigma(x*y*z).at n=27A173792
• Number of Carlitz compositions of n that either have length 1, or have length greater than or equal to 2 and are palindromic if we exclude the first part.at n=33A291941
• Lengths of runs of identical terms in A353710.at n=37A353718
• Expansion of (1/x) * Series_Reversion( x * (1-x^2/(1-x))^2 ).at n=10A368957
• Consecutive states of the linear congruential pseudo-random number generator 20403*s mod 2^15 when started at s=1.at n=1A384196