23050

Appears in sequences

• E.g.f. 1 + x*exp(x) + x^2*exp(2*x).at n=10A003013
• Number of resistance values that can be constructed using exactly n 1-ohm resistors in series or parallel but not with fewer resistors.at n=12A051389
• a(n) = 15*n^2 + 6*n + 1.at n=39A080861
• Round(1000*x), where x is the solution to x = 5^(n-x).at n=25A104744
• Number of different strings of length n+5 obtained from "123...n" by iteratively duplicating any substring.at n=13A137740
• Number of partitions of n with difference 8 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=39A242699
• 7*x - 1 Collatz-type sequence starting with a(0) = 11.at n=27A287330
• a(n) = (n-1)*(n-2)*(n^2+9*n+12)/24.at n=26A323847