23383

Appears in sequences

• a(n) = (n^3)/2 + (3*n^2)/2 + 3*n + 3.at n=34A127873
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.at n=8A149652
• Number of (n+3) X 9 0..1 matrices with each 4 X 4 subblock idempotent.at n=15A224566
• Numbers n such that phi(n) = sigma(n) - reversal(sigma(n)).at n=9A230012
• Consider the 2^n values of A162795(i)/i^2 for 2^n <= i < 2^(n+1); a(n) = value of i where this quantity is minimized.at n=13A261896
• Number of partitions of integer partitions of n where all parts have the same length.at n=25A319066
• Number of ways to tile a 2 X n strip with squares and P-shaped pentominos.at n=15A345953
• Number of integer partitions of n whose rounded-down mean is 2.at n=46A363745