378000

Appears in sequences

• Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 10 1-simplexes.at n=4A054557
• Let M_n be the n X n matrix with M_n(i,j)=1/(i+j+1); then a(n)=1/det(M_n).at n=2A069640
• a(n) = n! * Sum_{k=1..floor(n/2)} 1/(2k).at n=9A092691
• Triangle read by rows: T(n,h)/(n-1), where T is the array in A101819.at n=25A101820
• Triangle read by rows: T(n,k) is the sum of the weights of all vertices labeled k at depth n in the Catalan tree (1 <= k <= n+1, n >= 0).at n=32A102625
• Numbers m that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (m raised to k+1 must not be a multiple). Case k=15.at n=12A135200
• Number of permutations of length n with no consecutive triples i,...i+r,...i+2r (mod n) for all r, and for all equal spacings d.at n=6A174086
• Members of A025487 whose prime signature is self-conjugate (as a partition).at n=13A181825
• Area A of the triangles such that A, the sides and two medians are integers.at n=15A181928
• Number of 2-step self-avoiding walks on an n X n X n X n 4-cube summed over all starting positions.at n=14A188785
• Augmentation of the triangle A004736. See Comments.at n=31A193561
• Triangle T(n,k) giving number of degree-2n permutations which decompose into exactly k cycles of even length, k=0..n.at n=17A204420
• Govindarajan's triangle D arising in enumeration of multi-dimensional partitions, read by rows.at n=47A216804
• Numbers n such that 2*n and n^3 have the same digit sum.at n=29A266315
• Average of amicable pairs (x,y), ordered by the smaller value x given in A002025.at n=25A275315
• Average of amicable pairs (x,y), ordered by the sum x+y given in A259953.at n=25A275316
• Partial products of A067392; a(1) = 1.at n=7A281024
• Number of chiral pairs of rows of length 5 using up to n colors.at n=15A321672
• Triangle read by rows: T(n,k) is the sum of the number of the arrangements of p_1 1's, p_2 2's, ..., p_k k's (p_1 + p_2 + ... + p_k = n and p_1 >= p_2 >= ... >= p_k) avoiding equal consecutive terms, where 1 <= k <= n.at n=51A321686
• Numbers m that have recursively self-conjugate prime signatures.at n=7A330781