18070

Appears in sequences

• Row 3 of array in A047666.at n=29A047667
• Truncated square pyramid numbers: a(n) = Sum_{k = n..2*n-1} k^2.at n=20A050410
• Number of partitions of n such that the least part occurs exactly twice.at n=46A096373
• a(n) = Sum_{k=0..floor(n/2)} (n-k)^2.at n=39A129371
• Greatest number m such that the fractional part of (Pi-2)^A153717(n) <= 1/m.at n=12A153721
• Half the number of length n integer sequences with sum zero and sum of squares 3698.at n=3A157575
• Numbers k such that k!6 - 3 is prime, where k!6 is the sextuple factorial number (A085158).at n=22A279646
• Maximum value of the cyclic convolution of the first n positive integers with themselves.at n=38A294172
• The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.at n=13A330851