27991

Appears in sequences

• a(n) = dot_product(1,2,...,n)*(7,8,...,n,1,2,3,4,5,6).at n=39A026049
• Number of two-rowed partitions of length 4.at n=34A070557
• Number of connected 2-element multiantichains on a labeled n-set.at n=10A094734
• Numbers that have 10 terms in their Zeckendorf representation.at n=32A179250
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3), 3-principalization type (4443), IPAD [(3,3,3)^3, (3,9)], and Hilbert 3-class field tower of unknown length at least 3.at n=5A242873
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees.at n=19A247691
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 515", based on the 5-celled von Neumann neighborhood.at n=30A272707
• Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} x^n * (x^(2*n) - A(x))^n.at n=12A358937