46821

Appears in sequences

• Related to number of digraphs.at n=4A003084
• a(n) = Sum_{d|n} d*Fibonacci(n/d).at n=23A066769
• Expansion of (1/(1-x)^2)*c(x/(1-x)^4) where c(x) is the g.f. of A000108.at n=7A162477
• Number of nondecreasing arrangements of n numbers in -3..3 with sum zero and sum of squares less than n*12/3.at n=35A183929
• First differences of A213709.at n=19A226060
• Number of vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).at n=21A331763